I have the jig with a set screw. It has repeatability and works well for me, however you're limited to increments of .005. There's no in between say .003 or similar.I have made about 100 yelpers with mine. I don't intend to sell, I have given a few away, but my main goal was to make calls I liked and would yelp real real soft but could pop a loud note out and not fold over and squeak. I have a notepad full of notes. Some have stars beside them, some are marked out. There's a enormous amount of combinations from stretch, material, heck even tape but I have kept it pretty simple and they have worked well thusfar. To me it's fun. Other than my one box call I take and locator(crow), all the calls in my vest(or mouth) I've hand made. And I'm going to try to build a few boxes and crow calls at some point in my life. Too me that's a really cool aspect of a hunt is killing one with a call you built.

I would like that tape cutter, but I have gotten ok with a pair of scissors for my liking.