Haha Del, I was also making another fit of a more circular tiller AND an elliptical tiller. My point is mostly that fitting two identical ellipses (or circles, which is an ellips with two identical radii, actually) helps you to see differences between limbs with a detailed precision you couldn't see otherwise.
But it's not because you can fit a circle to a limb curve that you have a circular tiller. To see that I add a circle with the top of the circle at the fade, and then I remodel it to whatever fits one limb, and clone it to the other limb. I also kept one circular, and one circular but moved the top of the circle towards the limbs (cheating a bit; you see a tiny gap at the fades). That way you immediately see the difference (circular-elliptical), and you can also see if your profile matches expected tiller shape (arc of circle per limb for a pyramid,etc).
This said, I wouldn't mess with the tiller anymore.
As said before, the differences you still have are irrelevant in the hand. Actually, my placement of circles/ellipses assumes the arrow rest/nocking point is in the middle of the handle. It probably isn't, so you may need tweak the tiller according to where you want to place the arrow.
JOachim
