RE: peak draw weight
I have shot all of my bows in various spots from every end of the draw weight range, backed all the way out, and turned all the way in. I have yet to see a difference in performance as far accuracy goes. Keep in mind that any time you change anything on a bow it may require retuning. You can't expect to go from maximum draw weight to minimum draw and not have to touch up your nocking point or arrow spine. Sometimes you can get away with it, but not always.
As a matter of fact I target shoot with my bows limbs backed all the way out, not all the way in. None of them make any more noise this way or are any less accurate.
Paul