Finally got around to installing the amber CRT tonight!
My first snag was that the wires used on the Classic were (strangely) a thicker gauge of wire than the SE(/30)'s, so I had to take a different tack when soldering the longer wires to the spare SE neck board I bought:
Thankfully the board is a simple, one sided (layered?) variety so I just went right onto the pads, vs through-hole
Here's a view of the CRT in place and the full length of the new neck board connector:
Did run into a tight, but not tugging fit with the ground wire. I would have spliced another wire, but I misplaced my heat shrink tubing, annoyingly.
Cheesey StartupScreen, I know
There is some distortion on the bottom (top) of the CRT that I wasn't able to correct with the yoke magnets (what I could reach anyway), but I'm pretty satisfied with it! I did have to adjust the rings quite a bit to get it right on center. Let's just say I'm thankful for the more modern controls of the other Macintosh monitors that don't require such manual operation.