So I am waiting for some new head nut washers, because I'm silly and lost some along the way home. In the meantime, I got the touched-up head bearing cups mounted nicely, after knurling them a little with a center punch and even using a touch of green bearing mount stick on the surfaces. (I have a bicycle tool for removing them that can be employed if necessary--but I'm hoping they stay in for good, and only bearings possibly need to be swapped out over the life of the bike.)
I also tackled a little re-wiring I was loath to do, but just had to be done. I am relocating the block connectors for the front end, except the headlamp, under the tank rather than behind the headlight. The positioning I had was terrible, with the bulky weatherpacks in all the wrong places. It wasn't just aesthetic; it looked like the wires were being strained/over-flexed during steering. So, a ton of crimp-on butt-splices and heatshrink later, I'm looking at a better scheme laid out on the bike. Just have to finish the grounds.