Hey, my dad shoots a bow with a whisker biscut and has problem with broadhead flight. I think possibly he is torquing his bow and the total contact rest like the Whisker biscuit is probibly causing him problems. Do you think a zero affect would help him. He has tried to papertune and he gets a tear and his tiller is perfect. We tried to adj. and it doesn't help. He tries different spines and also tried the bare arrow tune. What do you guys think. Thanx for any input,Travis ps, he is using the NAP thunderhead pro's and has tried mangnus and bear. He shoots Compound Parker 34.His form seems good and he doesn't have any vary if any at all in it.