When I started shooting a bow, many years ago, LOL, I had trouble finding the same spot on my jaw to anchor. To over come this, and be able to hit the exact spot every time, I put one of the small, round, bandaids on my jaw where the best anchor occured, for me. This made it a smiple operation to hit the same spot ever time. When you get it drilled into your head where this spot is, do away with the bandaid. I have found that if my form starts to go south, I can put the bandaid back on, and get every thing back together. Just my two cents. Be safe.
Shoot Straight
Derbytown