got an 05 ultratec this year and was checking the broadhead flight. terrible. so i thought maybe its a little out of tune. so downstairs i go and start paper tuning. back and forth. always ended up highleft tear. ultralight 400 gold tip, 72 pounds, 28' arrow. i think the spine is too light. turned the bow down to 63 pounds, and shot three perfect bullet holes. is it the spine? i'm attempting to shoot magnus stingers and thunderhead 125's.