At the end of part five it sounds like you intend to taper the back of the bow? As in, same process as applied to the belly, but on the back?
It's been done, but it's nowhere near safe. I've reduced weight on a couple bows, including a mollegabet I've got drying right now, by removing one or two back rings to lose forty pounds after the tiller looks right, and just had to do minor adjustments thereafter. But please, try to keep a whole back ring; I really like the looks of this stave.
Also, the way I get my floor tiller is by looking at the belly rings, like you showed. It's best to be sure that the ring out of the fade doesn't taper and then bulge going into the handle as that will lead to a lot of fade bend, which makes for a whole lot of set.
I'm probably preaching to the choir, but no sense keeping quiet, right?