Replacing the five power supply caps was a breeze. Each one is only a single capacitor.
Next, I dove into the separate audio amp.
The 5Y3 was traumatized and several resistors roasted underneath.
The chassis cleaned up beautifully with CLR.
I did a full recap, replaced all the resistors, 5Y3 and missing 6AT6. Also painted the transformer.
I'm happy to report it works very well. Plenty of volume with very little hum or distortion.