need help with stitch/needle/thread for thick purse seams
As many of you know, I have embarked on a purse making frenzie! I have made a couple with very stiff interfacing, but once you sew the seams together, and try topstitching, all you-know-what happens. I discovered the seams are loose (stitches don't seem to hold tightly enough so I can see daylight thru them), and sometimes when topstitching, stitches skip and are not uniform in size. I use a walking foot, and my machine sews everything else fine. What size needle, thread, tension ect should I be using for these really tough thick seams? It doesn't happen when I use fusible fleece or thinner interfacing, just this strong stuff (which some patterns call for). Thanks!