Well, 2 days ago I was feeling pretty bad, did the self-test, and learned I have Covid-19! I had to cancel a planned trip and isolate at home. Fortunately I'm not feeling too terrible, and I was able to do some more sequestered woodworking:
I got in additional trim-strips for the top, and began leveling them:

For the bridge position, I had checked and re-checked where it belonged, and I finally glued it down:

Then it was time to commit the neck-joint, the dovetail joint which I had fined-tuned:

The guitar is playable now! My favorite view is looking inside at the walnut back and the bracing for it:

Recalling the original guitar, the resto-mod is definitely improved! It does sound richer. It is also working with a better action, and less buzzing of the strings. The original guitar had a shim under the bridge-insert which is no longer needed. The whole thing is a worthy upgrade... I just need to finish the surfaces. The spruce top and the walnut back were joyful to work with. The mahogany sides fought me all the way with their reversing grains, and they will have a good deal of filler applied before it's all sealed up:

Happy woodworking,
Chris