you have tiller so that the energy of the bow goes straight through the arrow through the pile, not down towards the hand or up towards the sight. does that make sense?
it's because the nock point isn't in the middle of the bow, and i know that the limbs aren't the same stiffness, but, i think you still need to adjust tiller so that the force in the bow is directed through the arrow.
i hope it's clear what i'm trying to say!!
