Ok, more polishing the turd....

I just can't leave well enough alone.

I wasn't happy with the reverb sound of this amp.
It's mostly due to the limitations of the single spring reverb tank.
At
almost any reverb setting it sounded more like a metallic "clank" than reverb.
So I thought the way to get a more musical/realistic reverb sound,
was to have some control over the frequency's being sent to the tank.
I first tried the reverb tone network you see in the schematic,
without the trim pot and no buffer.
2 X 51K resistors in place of the trim pot and output taken from the junction of them.
This worked somewhat,
but the tone network loaded down the circuit too much, reverb too quiet.
So I took the volume buffer (from previous schematic) and swapped it to the tone network.
Then adding the trim pot as a reverb tone control.
This works great!
The tone network adds a mid notch and the trim pot lets you roll off the highs.
The boards are supported on solid core stiff wires.