I had a 25 inch module and had the stop set so it would draw 27 inches.
That's exactly what you want to stay away from though Paul. If that cam over rotates (as it must be set up like that) it'll chew your string to bits very quickly.
I'll pm you my cell # and I'll meet you at Pine Grove if you want. Or you can go back to Jackson either way. I'd be glad to help you get it perfect.