Rich-
thanks for posting your bows at full draw. Keeping the bend constant certainly seems like the way to get the most out of such short bows. How heavy are the arrows you prefer to use with the circular tiller? gpp?
After looking back at the encyclopedia, I find only about a half a dozen bows with thickness illustrated. Three definitely seem like the bows would bend more in the handle , while three others have thickened handles, and by presumption, may have been stiffer in the center of the bow. A few others had somewhat thick mid-limbs, but thinner tips probably yielding highly elliptical or possibly whipped tillers. In all, though, more measurements of thickness when illustrating historical bows would be helpful.
willie