Attached Link: rendo dynamic cloth tutorial

found this excellent rendo tutorial on dynamic clothing and it works great

I had one little questions re some clothing though. For example V4s default sports top, when exporting and importing as obj, everything works fine. However, once simulated the seams seem to separate from the cloth, it appears the cloth and trims are setup as 2 different material groups.
I did use the 'weld' option when importing the obj file, but that doesn't appear to work even though the verticies seem to be intersecting? Is there a way to "really" weld them together so the materials parts stay together?

Alternatively is there a way to remove the seams (although the "welding" would be much preferred), because the cloth itself would actually work without the seams attached? I couldn't find a way to delete only the seams part of the clothing.

If anyone has further info on this that would be much appreciated. Thanks in advance.
Trac