I put all the stuff back on the neck as best I could and popped the chassis back in.
Still have more work to do on it, but I'm anxious to see how the CRT looks.
Crap! No idea how this happened. RIP 6JS6C
Installed a used, weak one. Takes a while to get full horizontal deflection, but it's alive gain.
Looks like I didn't screw up the convergence too badly.
New circuit breaker is working fine, but all the other issues remain.
Lack of vertical height, poor linearity, very dirty volume control, etc.
I'll tackle all that stuff next.