Just to get back to one of the original questions...

The Hoyt split limbs do have a significant benefit over other "skinny" split limb designs. That is due to the width of the limb that the axle rigidly passes through being greater on each side of the cam. As the bow goes through the draw cycle, the sting and cable loading are dramatically changed, resulting in differing force vectors along the axle. By having this width on each side of the axle, the limb system will resist cam lean (that is induced by the varying axle point loading)moreso than the skinny split limbs.