Draw board / shooting machines.
Draw boards. Nice, but you don't need them and we've done without them for years. First one I ever saw was Byran Furgeson's. Byran being one of the most notable Traditional Trick Shot in the world. Wasn't fancy like the ones today, looked like heavy plywood with a inch scale markings. Just set bow so the grip caught a thick peg, attach hook to string and pull on a rope that ran through a pulley. He had little draw scale incorportate so get poundage at draw length.
So, I have my bow set up and done through a "J" hook screwed in the ceiling. The draw length is correct, the timing is perfect and the draw stops set perfect. But is it? Okay, a challenge flung and I don't back down. I take my bow to the archery shop that just opened. I know the owner, he's a ASA Senior Pro and sponsored by PSE. He has a homemade draw board/shooting machine. Here goes;
Me; "Tim, tell me where it's off." So Tim puts my bow in his machine with arrow nocked. He first draws it to the draw stops. The draw stops are fitted with O-rings.
Tim; "Man, they're perfect, both touching at the same time."
So Tim draws a bit more and both timing "tabs" touch.
Tim; "Sonny, I can't time a bow any better than you have yours."
So he fires my bow and the arrow is dead straight in the target butt. Arrow pulled and shot again gets the same results, perfectly straight in the target butt.
Tim; "Shoot that sucker!"
Me is ;)
Now, I didn't put my sight frame on my bow. Better than $300.00, nope, not in some machine, though Tim's machine holds the bow very well.
Bottom line; You can set up a bow very well with the use of a "J" hook, you have to be careful as letting up has derailed many bows. I've done it once and learned dang quick. You can also set up a bow without a draw board or "J" hook and I've done it plenty of times.