Thanks, but I was thinking the classic pyramid, where you taper straight to the tips (maybe 10" from the tips leave the tips the same width) from the widest point of the limbs, that gives a more circular tiller than the eliptical tiller of the modified pyramid. This would also allow me to tiller from the sides and leave the thickness the same the length of the limbs, to a point.

Based on this specific design I was wondering if 2" was enough to start.