LOL Ron, that's not quite what I was trying to explain. What I meant was, very early in the build you need to have everything laid out to get the correct architecture. The barrel is the first step, but then the next step is inletting the tang. You can't inlet the tang until you get the profile of the wrist cut and perfect, because that wrist profile sets up the relationship of all the lines of the entire rifle. You can pick any one feature, i.e., comb of the butt, angle of buttplate, placement of the lock, and they will also dictate the shape and angle of the other features, if it is supposed to look like a Hawken. It's just the tang naturally comes before the rest, so the top of the wrist must be correct, or the other lines will be incorrect.
If the tang were straight, instead of hourglass shaped, this wouldn't be so much of a challenge. If you inlet tang, and later want to change the wrist profile, you'll probably need to re-shape the curve of the tang, which will make it longer or shorter, so the hourglass shape can leave gaps where previously cut in. It's gotta be right the first time.
Hope this makes sense. Bill