Well, anyway, ask 3 experienced bowyers and you'll get 6 different answers. In the final analysis, the best of tiller is how the bow shoots. Take your tape measure and put it back in your toolbox. I take it outside and make my mind go blank (easy to do). I see how the handle pressure is and forget about hitting the target (S.O.P). Is it even or does the top or bottom have different pressures? Pressure should be even. Whether the pos. tiller is an 1/8", 1/4" or 12" don't mean nuthin' (bad grammar intended). How the bow shoots is the ticket. Jawge