Hi Sue, I've done a few on various types of card ranging from 225 gsm to 250 gsm
http://www.picturetrail.com/gallery.fcgi?p=999&gid=15271450
and also the Tapestry Card (from Joanna's shop) but that was on the inside of the box as I wanted the texture only on the outside.
http://www.picturetrail.com/gallery/view?&p=999&uid=8140530&gid=15270865&&imgid=264066050&offset=0
Hope that's of some help.

Love your boxes Dawn!
image Susan