Nice job of making the cookie cutter. Plus that is almost the exact pattern that I use on my Hula Dancer or I Spy tosome.
I seen some long scraper razor blade in the paint section at Lowes so will prolly grab one to play with. Plus with my son being a CNC machinist I may have something better then what I have been doing, No pictures tho but I habeen using a piece of chrome drain or fittings for smaller pattern. A take a couple blade and tape them to the outside and cut the shape and cut with scissors for the rest. Works fine but can be better. Those cutters you can buy but to expensive which is prolly why you built your own.
More fun i'll say to.
I got a bunch of them flies I made a few years ago is neglected to a capital N!
They got plenty of great actions on the water. I think problem I had was I fish where there is so much darn weeds and such I kept hanging up so I will do them weedless next time around.