It's looking more and more like I'll be 'Frankensteining' the two machines into one good one. There's no question about the bearings, spindle makes a lot of noise! I removed and replaced the spindle cartridge just as a 'dress rehearsal' for when I have the riggers once again provide power for the stored machine and remove the spindle from it and put it in the home machine. I know that spindle is good because I've heard it run several times and never noticed anything. So at this point I'm kinda resigned to having one good machine, and one to provide spare parts and eventually discard as scrap iron I suppose.