Index: trunk/src/obj_pstk.h
===================================================================
--- trunk/src/obj_pstk.h	(revision 22095)
+++ trunk/src/obj_pstk.h	(revision 22096)
@@ -173,10 +173,11 @@
 void pcb_pstk_shape_update_pa(pcb_pstk_poly_t *poly);
 
 /* Insert proto into the cache of data; if it's already in, return the existing
-   ID, else dup it and insert it. WARNING: make sure
-   pcb_pstk_proto_update() was called on proto some point in time before this
-   call, esle the hash is invalid */
+   ID, else dup it and insert it. The forcedup variant always dups.
+   WARNING: make sure pcb_pstk_proto_update() was called on proto some point
+   in time before this call, esle the hash is invalid. */
 pcb_cardinal_t pcb_pstk_proto_insert_dup(pcb_data_t *data, const pcb_pstk_proto_t *proto, int quiet);
+pcb_cardinal_t pcb_pstk_proto_insert_forcedup(pcb_data_t *data, const pcb_pstk_proto_t *proto, int quiet);
 
 /* Change the non-NULL hole properties of a padstack proto; undoable.
    Returns 0 on success. */
Index: trunk/src/obj_pstk_proto.c
===================================================================
--- trunk/src/obj_pstk_proto.c	(revision 22095)
+++ trunk/src/obj_pstk_proto.c	(revision 22096)
@@ -691,12 +691,12 @@
 	return n;
 }
 
-pcb_cardinal_t pcb_pstk_proto_insert_dup(pcb_data_t *data, const pcb_pstk_proto_t *proto, int quiet)
+static pcb_cardinal_t pcb_pstk_proto_insert_dup_(pcb_data_t *data, const pcb_pstk_proto_t *proto, int quiet, int forcedup)
 {
-	pcb_cardinal_t n, first_free;
+	pcb_cardinal_t n, first_free = PCB_PADSTACK_INVALID;
 
 	n = pcb_pstk_proto_insert_try(data, proto, &first_free);
-	if (n != PCB_PADSTACK_INVALID)
+	if ((n != PCB_PADSTACK_INVALID) && (!forcedup))
 		return n; /* already in cache */
 
 	/* no match, have to register a new one, which is a dup of the original */
@@ -717,6 +717,17 @@
 	return n;
 }
 
+pcb_cardinal_t pcb_pstk_proto_insert_dup(pcb_data_t *data, const pcb_pstk_proto_t *proto, int quiet)
+{
+	return pcb_pstk_proto_insert_dup_(data, proto, quiet, 0);
+}
+
+pcb_cardinal_t pcb_pstk_proto_insert_forcedup(pcb_data_t *data, const pcb_pstk_proto_t *proto, int quiet)
+{
+	return pcb_pstk_proto_insert_dup_(data, proto, quiet, 1);
+}
+
+
 pcb_cardinal_t pcb_pstk_proto_replace(pcb_data_t *data, pcb_cardinal_t proto_id, const pcb_pstk_proto_t *src)
 {
 	pcb_pstk_proto_t *dst;