I shoot about 30 shoots today and adjusted my nock point all over. I started with it dead center and moved it up at about 1/16in after 3 shoots, I found the best flight at about 1/8 or so above center, but it still was not good about 2 or 3 inch up or down. when I back up to about 30 yards I can see some tail spin and side to side movement. The grip on the bow is a flat style fat grip, and I have to hold it completly different from my old bow. It is a vary high performance bow with fast flight, lots of reflex deflex. It still hits close to the bullseye, someone said that tey have only seen this with vanes, thats what it looked like to me to, I shoot 5.5in shield cut feathers. I am going to give the guy who built a call and see what I shoud try, the only thing is that I dont have allkinds of money to buy arrows and test them.