I want to describe how I tillered this one- a technique I use on almost all my bows. First I floor tillered it, achieving the initial taper using calipers to measure width and thickness every couple inches.
Then I heat treated it, inducing about 2 inches reflex and adjusting tip alignment.
Next, I drew straight lines on the sides of the bow, each line must be of equal length, and you draw a bunch of them down the length of the whole bow (see picture one below).
Then I brace the bow and use the same straightedge I had drawn the lines with to judge how each line has bent, (photo 2 below). By comparing the bend in each line, I can see exactly how much each section is bending.