Being a bow hunter ed. instructor, I was thinking about how I can "effectively" measure each person's "comfortable" draw length for my classes. So, I bought 2 Genesis bows (single cam with 0% let off - infinite draw length from 15"-30"). I have one bow set up with a 3/4" string loop, the other is set up for fingers or release (direct to the string). My idea is that if I get 2-full-length arrows, embed a graduated scale ( in 1/8 inch increments) on them, with the zero marks starting exactly on the rests, when someone, regardless of draw length, draws to their "comfortable" form, I will be able to tell them their exact comfortable DL. The question that keeps bothering me is "What about different brace heights for different bows?". The BH on the Genesis is 7". The zero mark on the arrows start 7.5" from the string. So, if someone draws the bow and the measurement on the arrow is 21", their true DL would be 28.5" (right?). BUT - If someone who has a bow (or is looking for a new bow) with a 6.5" BH draws these bows, won't the measurement that I give them be wrong? How can I set this up so it can be accurate? Do I let them know the measurement that I give them is for a bow with a 7" BH, and that to get their true DL for their bow, add the BH of their bow (or the bow they want to buy) to the measurement on the arrow to get their true draw length? [:@] Sometimes I give myself a headache [8D]. Any thoughts/suggestions are welcome!