There are various designs for zipper boards. This is the best (not perfect) one I've used. This is my second one of this kind, to speed things up. Past purchases have had too large of a gutter, one only had one gutter, only deep enough for the fabric, not the zipper. I would suggest a soft material inside that gutter. In the meantime, I add cardboard.
Hey Kelly!
WOW thank you for this stellar review It may not be perfect for every zip-up, but if we're close, that's a win We appreciate your time and sharing your tips! Happy Printing!
Kayli B