Nice!
I've got a customer in Pittsfield that has one of those, and was eager to get it completely restored. Then I told him what it would probably cost him. End of story--at least for now.
Some day or another I might take this up as a hobby again, but working in a music store as electronics technician soured me some. Some day....
But I'm just the same impressed with what you have done, and my hat's off to you.
Good luck with your freeze mist in locating the horiz AFC drift problem.