When I used to shoot Thunderheads I would spintest them and adjust until there was no wobble. Three seasons ago I started using NAP Crossfires and haven't had to tune my arrows, they fly like a field point with no tuning. I do make sure I weigh my arrows to make sure I am shooting consistant weighted arrows, I have a set with feathers and a set with Quickspins that are both weighing 440-445gr.