The demo bow’s were always set up with the most popular cams and limbs. That means we sell more 29″ cams and more 70# limbs than any other.
The sad part is that most shooters are over bowed, and most are drawing to much cam. Some by as much as two inches or more. I have had some go back to the dealer and get 50# limbs for there 70# bows.
I do not keep exact records, but at least 75 to 80% of people that I help with ther set up have both of those problems.