TheReddHobbit

Nifty product, I think you should use a wheel instead of a card to push the fabric into the zipseam. (spline roller)

Don't reinvent the wheel. My suggest is to do a bit of shopping, find one that works and is inexpensive. Chase down the manufacturer or wholesaler and buy cheap.

You have to make it idiot proof if you expect idiots like me to buy them. :-D

Yes