I am currently working on an osage bow that is parallel for half of the limb and them pyramids to the tips. What type of tiller profile should it have? Elliptical,circle or a combo of both? I know that parallel limbs will produce an elliptical tiller profile while pyramid style produces the arc of the circle. Considering that this one incorporates both on the limb I am unsure what a good tiller should look like. Thanks in advance. Danny