Randy, Art has made many and he just uses a piece of leather with the insert pieces glued in. The chain ring is attached by leather rivets.
I was going to make one yesterday, but ran out of time. I’m gonna to try to make one today so I’ll have better input on this tomorrow. I’m going to try to make one like Steve Schmidts. He used thicker leather than Art. Al
PS and I got some ole leather that once was a cow hobble. It is covered with cow crap and other dried fluids – should be a great one to use as the “loaner” at the Dino Gym Challenge. haha