There used to be a video about tiller tuning. I can't remember who made it. You would shoot groups with lots of different tiller combinations and see which shot best. The idea is that the limbs if out of time by just a little will not be as stable in your hand, that one will be overpowering the other just a little and that when you hit the sweet spot, it would hold steady for you. I have been pondering.... what if you mounted a lazer on your bow just to see how it danced on the target. Without firing a shot, aim with different tiller settings and record which lazer beem is the most stable, least dancing around. We only guess by claiming even tiller... or 1/8 positive. What do you think. I'm gonna try it