diff --git a/backend_canonselphy.c b/backend_canonselphy.c
index 768f749..bbbc089 100644
--- a/backend_canonselphy.c
+++ b/backend_canonselphy.c
@@ -623,12 +623,10 @@ static void *canonselphy_init(void)
 
 extern struct dyesub_backend canonselphy_backend;
 
-static int canonselphy_attach(void *vctx, struct libusb_device_handle *dev,
+static int canonselphy_attach(void *vctx, struct libusb_device_handle *dev, int type,
 			      uint8_t endp_up, uint8_t endp_down, uint8_t jobid)
 {
 	struct canonselphy_ctx *ctx = vctx;
-	struct libusb_device *device;
-	struct libusb_device_descriptor desc;
 	int i, num;
 	uint8_t rdbuf[READBACK_LEN];
 
@@ -637,16 +635,12 @@ static int canonselphy_attach(void *vctx, struct libusb_device_handle *dev,
 	ctx->dev = dev;
 	ctx->endp_up = endp_up;
 	ctx->endp_down = endp_down;
+	ctx->type = type;
 
-	device = libusb_get_device(dev);
-	libusb_get_device_descriptor(device, &desc);
-
-	if (desc.idProduct == USB_PID_CANON_CP900)
+	if (ctx->type == P_CP900) {
+		ctx->type = P_CP_XXX;
 		ctx->cp900 = 1;
-
-	ctx->type = lookup_printer_type(&canonselphy_backend,
-					desc.idVendor, desc.idProduct);
-
+	}
 	for (i = 0 ; selphy_printers[i].type != -1; i++) {
 		if (selphy_printers[i].type == ctx->type) {
 			ctx->printer = &selphy_printers[i];
@@ -1143,7 +1137,7 @@ static const char *canonselphy_prefixes[] = {
 
 struct dyesub_backend canonselphy_backend = {
 	.name = "Canon SELPHY CP/ES (legacy)",
-	.version = "0.100",
+	.version = "0.101",
 	.uri_prefixes = canonselphy_prefixes,
 	.cmdline_usage = canonselphy_cmdline,
 	.cmdline_arg = canonselphy_cmdline_arg,
diff --git a/backend_canonselphyneo.c b/backend_canonselphyneo.c
index dccc2ff..bd373af 100644
--- a/backend_canonselphyneo.c
+++ b/backend_canonselphyneo.c
@@ -66,6 +66,7 @@ struct selphyneo_ctx {
 	struct libusb_device_handle *dev;
 	uint8_t endp_up;
 	uint8_t endp_down;
+	int type;
 
 	uint8_t *databuf;
 	uint32_t datalen;
@@ -191,7 +192,7 @@ static void *selphyneo_init(void)
 
 extern struct dyesub_backend selphyneo_backend;
 
-static int selphyneo_attach(void *vctx, struct libusb_device_handle *dev,
+static int selphyneo_attach(void *vctx, struct libusb_device_handle *dev, int type,
 			    uint8_t endp_up, uint8_t endp_down, uint8_t jobid)
 {
 	struct selphyneo_ctx *ctx = vctx;
@@ -205,6 +206,7 @@ static int selphyneo_attach(void *vctx, struct libusb_device_handle *dev,
 	ctx->dev = dev;
 	ctx->endp_up = endp_up;
 	ctx->endp_down = endp_down;
+	ctx->type = type;
 
 	device = libusb_get_device(dev);
 	libusb_get_device_descriptor(device, &desc);
@@ -494,7 +496,7 @@ static const char *canonselphyneo_prefixes[] = {
 
 struct dyesub_backend canonselphyneo_backend = {
 	.name = "Canon SELPHY CP (new)",
-	.version = "0.16",
+	.version = "0.17",
 	.uri_prefixes = canonselphyneo_prefixes,
 	.cmdline_usage = selphyneo_cmdline,
 	.cmdline_arg = selphyneo_cmdline_arg,
diff --git a/backend_common.c b/backend_common.c
index 0564299..02973c8 100644
--- a/backend_common.c
+++ b/backend_common.c
@@ -76,6 +76,30 @@ static int backend_claim_interface(struct libusb_device_handle *dev, int iface,
 	return ret;
 }
 
+static int lookup_printer_type(struct dyesub_backend *backend, uint16_t idVendor, uint16_t idProduct)
+{
+	int i;
+	int type = P_UNKNOWN;
+
+	for (i = 0 ; backend->devices[i].vid ; i++) {
+		if (extra_pid != -1 &&
+		    extra_vid != -1 &&
+		    extra_type != -1) {
+			if (backend->devices[i].type == extra_type &&
+			    extra_vid == idVendor &&
+			    extra_pid == idProduct) {
+				return extra_type;
+			}
+		}
+		if (idVendor == backend->devices[i].vid &&
+		    idProduct == backend->devices[i].pid) {
+			return backend->devices[i].type;
+		}
+	}
+
+	return type;
+}
+
 /* Interface **MUST** already be claimed! */
 #define ID_BUF_SIZE 2048
 static char *get_device_id(struct libusb_device_handle *dev, int iface)
@@ -922,6 +946,7 @@ int main (int argc, char **argv)
 	char *type;
 	char *fname = NULL;
 	char *use_serno = NULL;
+	int  printer_type;
 
 	DEBUG("Multi-Call Dye-sublimation CUPS Backend version %s\n",
 	      BACKEND_VERSION);
@@ -1102,8 +1127,29 @@ int main (int argc, char **argv)
 	      backend->name, backend->version);
 	backend_ctx = backend->init();
 
+	{
+		struct libusb_device *device;
+		struct libusb_device_descriptor desc;
+
+		device = libusb_get_device(dev);
+		libusb_get_device_descriptor(device, &desc);
+
+		printer_type = lookup_printer_type(backend,
+					   desc.idVendor, desc.idProduct);
+		if (printer_type <= P_UNKNOWN) {
+			ERROR("Unable to lookup printer type\n");
+			ret = CUPS_BACKEND_FAILED;
+			goto done_close;
+		}
+
+	}
 	/* Attach backend to device */
-	backend->attach(backend_ctx, dev, endp_up, endp_down, jobid);
+	if (backend->attach(backend_ctx, dev, printer_type, endp_up, endp_down, jobid)) {
+		ERROR("Unable to attach to printer!");
+		ret = CUPS_BACKEND_FAILED;
+		goto done_close;
+	}
+
 //	STATE("+org.gutenprint-attached-to-device\n");
 
 	if (!uri) {
@@ -1222,30 +1268,6 @@ done:
 	return ret;
 }
 
-int lookup_printer_type(struct dyesub_backend *backend, uint16_t idVendor, uint16_t idProduct)
-{
-	int i;
-	int type = -1;
-
-	for (i = 0 ; backend->devices[i].vid ; i++) {
-		if (extra_pid != -1 &&
-		    extra_vid != -1 &&
-		    extra_type != -1) {
-			if (backend->devices[i].type == extra_type &&
-			    extra_vid == idVendor &&
-			    extra_pid == idProduct) {
-				return extra_type;
-			}
-		}
-		if (idVendor == backend->devices[i].vid &&
-		    idProduct == backend->devices[i].pid) {
-			return backend->devices[i].type;
-		}
-	}
-
-	return type;
-}
-
 void dump_markers(struct marker *markers, int marker_count, int full)
 {
 	int i;
diff --git a/backend_common.h b/backend_common.h
index 57250f0..941fd1c 100644
--- a/backend_common.h
+++ b/backend_common.h
@@ -89,7 +89,7 @@
 
 /* To enumerate supported devices */
 enum {
-	P_ANY = 0,
+	P_UNKNOWN = 0,
 	P_ES1,
 	P_ES2_20,
 	P_ES3_30,
@@ -97,6 +97,7 @@ enum {
 	P_CP790,
 	P_CP_XXX,
 	P_CP10,
+	P_CP900,
 	P_CP910,
 	P_KODAK_6800,
 	P_KODAK_6850,
@@ -156,7 +157,7 @@ struct dyesub_backend {
 	const char **uri_prefixes;
 	void (*cmdline_usage)(void);  /* Optional */
 	void *(*init)(void);
-	int  (*attach)(void *ctx, struct libusb_device_handle *dev,
+	int  (*attach)(void *ctx, struct libusb_device_handle *dev, int type,
 		       uint8_t endp_up, uint8_t endp_down, uint8_t jobid);
 	void (*teardown)(void *ctx);
 	int  (*cmdline_arg)(void *ctx, int argc, char **argv);
@@ -172,7 +173,6 @@ int send_data(struct libusb_device_handle *dev, uint8_t endp,
 	      uint8_t *buf, int len);
 int read_data(struct libusb_device_handle *dev, uint8_t endp,
 	      uint8_t *buf, int buflen, int *readlen);
-int lookup_printer_type(struct dyesub_backend *backend, uint16_t idVendor, uint16_t idProduct);
 
 void dump_markers(struct marker *markers, int marker_count, int full);
 
diff --git a/backend_dnpds40.c b/backend_dnpds40.c
index 8511958..931dc9a 100644
--- a/backend_dnpds40.c
+++ b/backend_dnpds40.c
@@ -541,8 +541,6 @@ static void *dnpds40_init(void)
 	}
 	memset(ctx, 0, sizeof(struct dnpds40_ctx));
 
-	ctx->type = P_ANY;
-
 	return ctx;
 }
 
@@ -579,24 +577,17 @@ static int dnpds40_query_mqty(struct dnpds40_ctx *ctx)
 	return count;
 }
 
-static int dnpds40_attach(void *vctx, struct libusb_device_handle *dev,
+static int dnpds40_attach(void *vctx, struct libusb_device_handle *dev, int type,
 			  uint8_t endp_up, uint8_t endp_down, uint8_t jobid)
 {
 	struct dnpds40_ctx *ctx = vctx;
-	struct libusb_device *device;
-	struct libusb_device_descriptor desc;
 
 	UNUSED(jobid);
 
 	ctx->dev = dev;
 	ctx->endp_up = endp_up;
 	ctx->endp_down = endp_down;
-
-	device = libusb_get_device(dev);
-	libusb_get_device_descriptor(device, &desc);
-
-	ctx->type = lookup_printer_type(&dnpds40_backend,
-					desc.idVendor, desc.idProduct);
+	ctx->type = type;
 
 	{
 		struct dnpds40_cmd cmd;
@@ -817,7 +808,7 @@ static int dnpds40_attach(void *vctx, struct libusb_device_handle *dev,
 			ctx->supports_gamma = 1;
 		break;
 	default:
-		ERROR("Unknown vid/pid %04x/%04x (%d)\n", desc.idVendor, desc.idProduct, ctx->type);
+		ERROR("Unknown printer type %d\n", ctx->type);
 		return CUPS_BACKEND_FAILED;
 	}
 
@@ -2742,7 +2733,7 @@ static const char *dnpds40_prefixes[] = {
 /* Exported */
 struct dyesub_backend dnpds40_backend = {
 	.name = "DNP DS-series / Citizen C-series",
-	.version = "0.101",
+	.version = "0.102",
 	.uri_prefixes = dnpds40_prefixes,
 	.cmdline_usage = dnpds40_cmdline,
 	.cmdline_arg = dnpds40_cmdline_arg,
diff --git a/backend_kodak1400.c b/backend_kodak1400.c
index dc21289..683ccab 100644
--- a/backend_kodak1400.c
+++ b/backend_kodak1400.c
@@ -296,24 +296,17 @@ static void *kodak1400_init(void)
 	return ctx;
 }
 
-static int kodak1400_attach(void *vctx, struct libusb_device_handle *dev,
+static int kodak1400_attach(void *vctx, struct libusb_device_handle *dev, int type,
 			    uint8_t endp_up, uint8_t endp_down, uint8_t jobid)
 {
 	struct kodak1400_ctx *ctx = vctx;
-	struct libusb_device *device;
-	struct libusb_device_descriptor desc;
 
 	UNUSED(jobid);
 
 	ctx->dev = dev;
 	ctx->endp_up = endp_up;
 	ctx->endp_down = endp_down;
-
-	device = libusb_get_device(dev);
-	libusb_get_device_descriptor(device, &desc);
-
-	ctx->type = lookup_printer_type(&kodak1400_backend,
-					desc.idVendor, desc.idProduct);
+	ctx->type = type;
 
 	ctx->marker.color = "#00FFFF#FF00FF#FFFF00";
 	ctx->marker.name = "Unknown";
@@ -642,7 +635,7 @@ static const char *kodak1400_prefixes[] = {
 
 struct dyesub_backend kodak1400_backend = {
 	.name = "Kodak 1400/805",
-	.version = "0.36",
+	.version = "0.37",
 	.uri_prefixes = kodak1400_prefixes,
 	.cmdline_usage = kodak1400_cmdline,
 	.cmdline_arg = kodak1400_cmdline_arg,
diff --git a/backend_kodak605.c b/backend_kodak605.c
index a1dafbd..0a35582 100644
--- a/backend_kodak605.c
+++ b/backend_kodak605.c
@@ -263,27 +263,18 @@ static void *kodak605_init(void)
 
 	ctx->media = malloc(MAX_MEDIA_LEN);
 
-	ctx->type = P_ANY;
-
 	return ctx;
 }
 
-static int kodak605_attach(void *vctx, struct libusb_device_handle *dev,
+static int kodak605_attach(void *vctx, struct libusb_device_handle *dev, int type,
 			   uint8_t endp_up, uint8_t endp_down, uint8_t jobid)
 {
 	struct kodak605_ctx *ctx = vctx;
-	struct libusb_device *device;
-	struct libusb_device_descriptor desc;
 
 	ctx->dev = dev;
 	ctx->endp_up = endp_up;
 	ctx->endp_down = endp_down;
-
-	device = libusb_get_device(dev);
-	libusb_get_device_descriptor(device, &desc);
-
-	ctx->type = lookup_printer_type(&kodak605_backend,
-					desc.idVendor, desc.idProduct);
+	ctx->type = type;
 
 	/* Make sure jobid is sane */
 	ctx->jobid = jobid & 0x7f;
@@ -695,7 +686,7 @@ static const char *kodak605_prefixes[] = {
 /* Exported */
 struct dyesub_backend kodak605_backend = {
 	.name = "Kodak 605",
-	.version = "0.29",
+	.version = "0.30",
 	.uri_prefixes = kodak605_prefixes,
 	.cmdline_usage = kodak605_cmdline,
 	.cmdline_arg = kodak605_cmdline_arg,
diff --git a/backend_kodak6800.c b/backend_kodak6800.c
index cf1ae9d..050e7a6 100644
--- a/backend_kodak6800.c
+++ b/backend_kodak6800.c
@@ -1005,27 +1005,18 @@ static void *kodak6800_init(void)
 
 	ctx->media = malloc(MAX_MEDIA_LEN);
 
-	ctx->type = P_ANY;
-
 	return ctx;
 }
 
-static int kodak6800_attach(void *vctx, struct libusb_device_handle *dev,
+static int kodak6800_attach(void *vctx, struct libusb_device_handle *dev, int type,
 			    uint8_t endp_up, uint8_t endp_down, uint8_t jobid)
 {
 	struct kodak6800_ctx *ctx = vctx;
-	struct libusb_device *device;
-	struct libusb_device_descriptor desc;
 
 	ctx->dev = dev;
 	ctx->endp_up = endp_up;
 	ctx->endp_down = endp_down;
-
-	device = libusb_get_device(dev);
-	libusb_get_device_descriptor(device, &desc);
-
-	ctx->type = lookup_printer_type(&kodak6800_backend,
-					desc.idVendor, desc.idProduct);
+	ctx->type = type;
 
         /* Ensure jobid is sane */
         ctx->jobid = jobid & 0x7f;
@@ -1279,7 +1270,7 @@ static const char *kodak6800_prefixes[] = {
 /* Exported */
 struct dyesub_backend kodak6800_backend = {
 	.name = "Kodak 6800/6850",
-	.version = "0.61",
+	.version = "0.62",
 	.uri_prefixes = kodak6800_prefixes,
 	.cmdline_usage = kodak6800_cmdline,
 	.cmdline_arg = kodak6800_cmdline_arg,
diff --git a/backend_magicard.c b/backend_magicard.c
index f374c7b..c5e29d8 100644
--- a/backend_magicard.c
+++ b/backend_magicard.c
@@ -114,7 +114,7 @@ struct magicard_ctx {
 	struct libusb_device_handle *dev;
 	uint8_t endp_up;
 	uint8_t endp_down;
-	uint8_t type;
+	int type;
 
 	uint8_t x_gp_8bpp;
 	uint8_t x_gp_rk;
@@ -453,24 +453,17 @@ static void* magicard_init(void)
 	return ctx;
 }
 
-static int magicard_attach(void *vctx, struct libusb_device_handle *dev,
+static int magicard_attach(void *vctx, struct libusb_device_handle *dev, int type,
 			   uint8_t endp_up, uint8_t endp_down, uint8_t jobid)
 {
 	struct magicard_ctx *ctx = vctx;
-	struct libusb_device *device;
-	struct libusb_device_descriptor desc;
 
 	UNUSED(jobid);
 
 	ctx->dev = dev;
 	ctx->endp_up = endp_up;
 	ctx->endp_down = endp_down;
-
-	device = libusb_get_device(dev);
-	libusb_get_device_descriptor(device, &desc);
-
-	ctx->type = lookup_printer_type(&magicard_backend,
-					desc.idVendor, desc.idProduct);
+	ctx->type = type;
 
 	ctx->marker.color = "#00FFFF#FF00FF#FFFF00";  // XXX YMCK too!
 	ctx->marker.name = "Unknown"; // LC1/LC3/LC6/LC8
@@ -915,7 +908,7 @@ static const char *magicard_prefixes[] = {
 
 struct dyesub_backend magicard_backend = {
 	.name = "Magicard family",
-	.version = "0.12",
+	.version = "0.13",
 	.uri_prefixes = magicard_prefixes,
 	.cmdline_arg = magicard_cmdline_arg,
 	.cmdline_usage = magicard_cmdline,
diff --git a/backend_mitsu70x.c b/backend_mitsu70x.c
index 875ad53..40e18b8 100644
--- a/backend_mitsu70x.c
+++ b/backend_mitsu70x.c
@@ -690,12 +690,10 @@ static void *mitsu70x_init(void)
 	return ctx;
 }
 
-static int mitsu70x_attach(void *vctx, struct libusb_device_handle *dev,
+static int mitsu70x_attach(void *vctx, struct libusb_device_handle *dev, int type,
 			   uint8_t endp_up, uint8_t endp_down, uint8_t jobid)
 {
 	struct mitsu70x_ctx *ctx = vctx;
-	struct libusb_device *device;
-	struct libusb_device_descriptor desc;
 
 	ctx->jobid = jobid;
 	if (!ctx->jobid)
@@ -704,12 +702,7 @@ static int mitsu70x_attach(void *vctx, struct libusb_device_handle *dev,
 	ctx->dev = dev;
 	ctx->endp_up = endp_up;
 	ctx->endp_down = endp_down;
-
-	device = libusb_get_device(dev);
-	libusb_get_device_descriptor(device, &desc);
-
-	ctx->type = lookup_printer_type(&mitsu70x_backend,
-					desc.idVendor, desc.idProduct);
+	ctx->type = type;
 
 	ctx->last_l = ctx->last_u = 65535;
 
@@ -2024,7 +2017,7 @@ static const char *mitsu70x_prefixes[] = {
 /* Exported */
 struct dyesub_backend mitsu70x_backend = {
 	.name = "Mitsubishi CP-D70 family",
-	.version = "0.78",
+	.version = "0.79",
 	.uri_prefixes = mitsu70x_prefixes,
 	.cmdline_usage = mitsu70x_cmdline,
 	.cmdline_arg = mitsu70x_cmdline_arg,
diff --git a/backend_mitsu9550.c b/backend_mitsu9550.c
index eb22b98..afcfd81 100644
--- a/backend_mitsu9550.c
+++ b/backend_mitsu9550.c
@@ -526,12 +526,10 @@ static void *mitsu9550_init(void)
 	return ctx;
 }
 
-static int mitsu9550_attach(void *vctx, struct libusb_device_handle *dev,
+static int mitsu9550_attach(void *vctx, struct libusb_device_handle *dev, int type,
 			    uint8_t endp_up, uint8_t endp_down, uint8_t jobid)
 {
 	struct mitsu9550_ctx *ctx = vctx;
-	struct libusb_device *device;
-	struct libusb_device_descriptor desc;
 	struct mitsu9550_media media;
 
 	UNUSED(jobid);
@@ -539,12 +537,7 @@ static int mitsu9550_attach(void *vctx, struct libusb_device_handle *dev,
 	ctx->dev = dev;
 	ctx->endp_up = endp_up;
 	ctx->endp_down = endp_down;
-
-	device = libusb_get_device(dev);
-	libusb_get_device_descriptor(device, &desc);
-
-	ctx->type = lookup_printer_type(&mitsu9550_backend,
-					desc.idVendor, desc.idProduct);
+	ctx->type = type;
 
 	if (ctx->type == P_MITSU_9550S ||
 	    ctx->type == P_MITSU_9800S)
@@ -1638,7 +1631,7 @@ static const char *mitsu9550_prefixes[] = {
 /* Exported */
 struct dyesub_backend mitsu9550_backend = {
 	.name = "Mitsubishi CP9xxx family",
-	.version = "0.36",
+	.version = "0.37",
 	.uri_prefixes = mitsu9550_prefixes,
 	.cmdline_usage = mitsu9550_cmdline,
 	.cmdline_arg = mitsu9550_cmdline_arg,
diff --git a/backend_mitsup95d.c b/backend_mitsup95d.c
index 95ef0ba..c0becc8 100644
--- a/backend_mitsup95d.c
+++ b/backend_mitsup95d.c
@@ -139,24 +139,17 @@ static int mitsup95d_get_status(struct mitsup95d_ctx *ctx, uint8_t *resp)
 	return CUPS_BACKEND_OK;
 }
 
-static int mitsup95d_attach(void *vctx, struct libusb_device_handle *dev,
+static int mitsup95d_attach(void *vctx, struct libusb_device_handle *dev, int type,
 			    uint8_t endp_up, uint8_t endp_down, uint8_t jobid)
 {
 	struct mitsup95d_ctx *ctx = vctx;
-	struct libusb_device *device;
-	struct libusb_device_descriptor desc;
 
 	UNUSED(jobid);
 
 	ctx->dev = dev;
 	ctx->endp_up = endp_up;
 	ctx->endp_down = endp_down;
-
-	device = libusb_get_device(dev);
-	libusb_get_device_descriptor(device, &desc);
-
-	ctx->type = lookup_printer_type(&mitsup95d_backend,
-					desc.idVendor, desc.idProduct);
+	ctx->type = type;
 
 	ctx->marker.color = "#000000";  /* Ie black! */
 	ctx->marker.name = "Unknown";
@@ -570,7 +563,7 @@ static const char *mitsup95d_prefixes[] = {
 /* Exported */
 struct dyesub_backend mitsup95d_backend = {
 	.name = "Mitsubishi P93D/P95D",
-	.version = "0.08",
+	.version = "0.09",
 	.uri_prefixes = mitsup95d_prefixes,
 	.cmdline_arg = mitsup95d_cmdline_arg,
 	.cmdline_usage = mitsup95d_cmdline,
diff --git a/backend_shinkos1245.c b/backend_shinkos1245.c
index 7959eb3..35be1e5 100644
--- a/backend_shinkos1245.c
+++ b/backend_shinkos1245.c
@@ -1276,22 +1276,15 @@ static void *shinkos1245_init(void)
 	return ctx;
 }
 
-static int shinkos1245_attach(void *vctx, struct libusb_device_handle *dev,
+static int shinkos1245_attach(void *vctx, struct libusb_device_handle *dev, int type,
 			      uint8_t endp_up, uint8_t endp_down, uint8_t jobid)
 {
 	struct shinkos1245_ctx *ctx = vctx;
-	struct libusb_device *device;
-	struct libusb_device_descriptor desc;
 
 	ctx->dev = dev;
 	ctx->endp_up = endp_up;
 	ctx->endp_down = endp_down;
-
-	device = libusb_get_device(dev);
-	libusb_get_device_descriptor(device, &desc);
-
-	ctx->type = lookup_printer_type(&shinkos1245_backend,
-					desc.idVendor, desc.idProduct);
+	ctx->type = type;
 
 	/* Ensure jobid is sane */
 	ctx->jobid = jobid & 0x7f;
@@ -1661,7 +1654,7 @@ static const char *shinkos1245_prefixes[] = {
 
 struct dyesub_backend shinkos1245_backend = {
 	.name = "Shinko/Sinfonia CHC-S1245/E1",
-	.version = "0.21",
+	.version = "0.22",
 	.uri_prefixes = shinkos1245_prefixes,
 	.cmdline_usage = shinkos1245_cmdline,
 	.cmdline_arg = shinkos1245_cmdline_arg,
diff --git a/backend_shinkos2145.c b/backend_shinkos2145.c
index be6f35e..3069bbb 100644
--- a/backend_shinkos2145.c
+++ b/backend_shinkos2145.c
@@ -793,6 +793,8 @@ struct shinkos2145_ctx {
 
 	uint8_t jobid;
 
+	int type;
+
 	struct s2145_printjob_hdr hdr;
 
 	uint8_t *databuf;
@@ -1383,7 +1385,7 @@ static void *shinkos2145_init(void)
 	return ctx;
 }
 
-static int shinkos2145_attach(void *vctx, struct libusb_device_handle *dev,
+static int shinkos2145_attach(void *vctx, struct libusb_device_handle *dev, int type,
 			      uint8_t endp_up, uint8_t endp_down, uint8_t jobid)
 {
 	struct shinkos2145_ctx *ctx = vctx;
@@ -1392,6 +1394,7 @@ static int shinkos2145_attach(void *vctx, struct libusb_device_handle *dev,
 	ctx->dev = dev;
 	ctx->endp_up = endp_up;
 	ctx->endp_down = endp_down;
+	ctx->type = type;
 
 	/* Ensure jobid is sane */
 	ctx->jobid = (jobid & 0x7f);
@@ -1770,7 +1773,7 @@ static const char *shinkos2145_prefixes[] = {
 
 struct dyesub_backend shinkos2145_backend = {
 	.name = "Shinko/Sinfonia CHC-S2145/S2",
-	.version = "0.51",
+	.version = "0.52",
 	.uri_prefixes = shinkos2145_prefixes,
 	.cmdline_usage = shinkos2145_cmdline,
 	.cmdline_arg = shinkos2145_cmdline_arg,
diff --git a/backend_shinkos6145.c b/backend_shinkos6145.c
index afefa83..5cfcef4 100644
--- a/backend_shinkos6145.c
+++ b/backend_shinkos6145.c
@@ -1234,7 +1234,7 @@ static int get_status(struct shinkos6145_ctx *ctx)
 	INFO("Head Distance:         %08u inches\n", le32_to_cpu(resp2->head_distance));
 
 	/* Query various params */
-	if(ctx->type == P_SHINKO_S6145D) {
+	if (ctx->type == P_SHINKO_S6145D) {
 		if ((ret = get_param(ctx, PARAM_REGION_CODE, &val))) {
 			ERROR("Failed to execute command\n");
 			return ret;
@@ -1891,22 +1891,15 @@ static void *shinkos6145_init(void)
 	return ctx;
 }
 
-static int shinkos6145_attach(void *vctx, struct libusb_device_handle *dev,
+static int shinkos6145_attach(void *vctx, struct libusb_device_handle *dev, int type,
 			      uint8_t endp_up, uint8_t endp_down, uint8_t jobid)
 {
 	struct shinkos6145_ctx *ctx = vctx;
-	struct libusb_device *device;
-	struct libusb_device_descriptor desc;
 
 	ctx->dev = dev;
 	ctx->endp_up = endp_up;
 	ctx->endp_down = endp_down;
-
-	device = libusb_get_device(dev);
-	libusb_get_device_descriptor(device, &desc);
-
-	ctx->type = lookup_printer_type(&shinkos6145_backend,
-					desc.idVendor, desc.idProduct);
+	ctx->type = type;
 
 	/* Attempt to open the library */
 #if defined(WITH_DYNAMIC)
@@ -2507,7 +2500,7 @@ static const char *shinkos6145_prefixes[] = {
 
 struct dyesub_backend shinkos6145_backend = {
 	.name = "Shinko/Sinfonia CHC-S6145/CS2",
-	.version = "0.25",
+	.version = "0.26",
 	.uri_prefixes = shinkos6145_prefixes,
 	.cmdline_usage = shinkos6145_cmdline,
 	.cmdline_arg = shinkos6145_cmdline_arg,
diff --git a/backend_shinkos6245.c b/backend_shinkos6245.c
index d680f8c..a976855 100644
--- a/backend_shinkos6245.c
+++ b/backend_shinkos6245.c
@@ -1466,12 +1466,10 @@ static void *shinkos6245_init(void)
 	return ctx;
 }
 
-static int shinkos6245_attach(void *vctx, struct libusb_device_handle *dev,
+static int shinkos6245_attach(void *vctx, struct libusb_device_handle *dev, int type,
 			      uint8_t endp_up, uint8_t endp_down, uint8_t jobid)
 {
 	struct shinkos6245_ctx *ctx = vctx;
-	struct libusb_device *device;
-	struct libusb_device_descriptor desc;
 	struct s6245_cmd_hdr cmd;
 
 	int num;
@@ -1479,12 +1477,7 @@ static int shinkos6245_attach(void *vctx, struct libusb_device_handle *dev,
 	ctx->dev = dev;
 	ctx->endp_up = endp_up;
 	ctx->endp_down = endp_down;
-
-	device = libusb_get_device(dev);
-	libusb_get_device_descriptor(device, &desc);
-
-	ctx->type = lookup_printer_type(&shinkos6245_backend,
-					desc.idVendor, desc.idProduct);
+	ctx->type = type;
 
 	/* Ensure jobid is sane */
 	ctx->jobid = jobid & 0x7f;
@@ -1889,7 +1882,7 @@ static const char *shinkos6245_prefixes[] = {
 
 struct dyesub_backend shinkos6245_backend = {
 	.name = "Shinko/Sinfonia CHC-S6245",
-	.version = "0.10WIP",
+	.version = "0.11WIP",
 	.uri_prefixes = shinkos6245_prefixes,
 	.cmdline_usage = shinkos6245_cmdline,
 	.cmdline_arg = shinkos6245_cmdline_arg,
diff --git a/backend_sonyupdr150.c b/backend_sonyupdr150.c
index 80fc4ea..fbadc6e 100644
--- a/backend_sonyupdr150.c
+++ b/backend_sonyupdr150.c
@@ -73,24 +73,17 @@ static void* updr150_init(void)
 	return ctx;
 }
 
-static int updr150_attach(void *vctx, struct libusb_device_handle *dev,
+static int updr150_attach(void *vctx, struct libusb_device_handle *dev, int type,
 			  uint8_t endp_up, uint8_t endp_down, uint8_t jobid)
 {
 	struct updr150_ctx *ctx = vctx;
-	struct libusb_device *device;
-	struct libusb_device_descriptor desc;
 
 	UNUSED(jobid);
 
 	ctx->dev = dev;
 	ctx->endp_up = endp_up;
 	ctx->endp_down = endp_down;
-
-	device = libusb_get_device(dev);
-	libusb_get_device_descriptor(device, &desc);
-
-	ctx->type = lookup_printer_type(&updr150_backend,
-					desc.idVendor, desc.idProduct);
+	ctx->type = type;
 
 	ctx->copies_offset = 0;
 
@@ -303,7 +296,7 @@ static const char *sonyupdr150_prefixes[] = {
 
 struct dyesub_backend updr150_backend = {
 	.name = "Sony UP-DR150/UP-DR200/UP-CR10",
-	.version = "0.22",
+	.version = "0.23",
 	.uri_prefixes = sonyupdr150_prefixes,
 	.cmdline_arg = updr150_cmdline_arg,
 	.init = updr150_init,