OK. I gave this a breather for a bit and now I'm back to making some progress. Here's where I'm at.
I got a fresh maple neck blank and sliced a fine walnut strip and spliced them all together so as to match the back of the headstock. This was then sanded down to become the backstrap that would extend from around the 2nd fret give or take all the way up through the headstock in one big, strong piece.
I started sanding it. And sanding it. And sanding it. And shaping it. And sanding it. Sizing it. Sanding it. Shaping it. Sizing it again.
Ooops. Angles were off. Start over. From scratch.
2nd try. Same thing. Made a new piece, also got a fixed belt sander and learned from my mistakes the first time and now I have it 99% sized up with only the tiniest of gaps left. Hoping that by this weekend I can actually glue on the backstrap and get down to actually shaping it down to look like a guitar again.
What's interesting is that most of the headstock break and/or backstrap videos you can find online are of course on Gibsons with mahogany necks. I get it. The neck angle makes this happen, it's real thin in parts and mahogany can be soft.
On the Country Gent.....all the same problems exist EXCEPT the neck is maple. Maple is freaking strong. And hard. Or at least this backstrap piece I'm putting together. This either hit at just the right angle, was very very thin originally or someone really slammed this down to break it. I don't know.
All that to say, I can't say I am 1000% confident that this will be perfect but I do know that if I can do this next step correctly I'll have a real fighting shot at getting a fully functional instrument with a long lasting repair.