RE: Changing letoff on bowtech
What kind of cam does it have? Most of the single cams adjust by using a different module and draw stop setting. Your shop should have chart, or you might find one online. I think my manual for my mighty might has one in it.
You can adjust a slight valley into them as well.
You could also just shorten the draw stop a little I think and it will have less let off. Might be the other way around though, I would have to look.
We have some pretty serious bowtech guys there though, I am sure someone will give you a more precise answer if you wait long enough. Or just call bowtech.
Paul