*giggle* that MUST be a good video!
Carolyn, what KIND of needle are you using? I'm wondering if a Topstitch needle will help with the shredding, if you're not already using one.
If you go here and scroll down, you will see the difference a Topstitch needle could make. I'd stick with the size 18, though.
http://www.superiorthreads.com/educa...-right-needle/