I do see one possible problem. Have the pics you put up been inverted. The reason being is, in the bottom board pic, the ground for vol pot is on the left. Therefore if pot is mounted as per pic with pot on it,,,,,,,, Full clockwise rotation will turn vol down not up. I must admit,,,"Been there done that".
Thanks for the heads up...I'm going to be wiring the pot to the board anyway. I've done so many amps with the tubes showing, I thought I would try one with everything inside this time, so the pot will have to be wired off the board. Its actually a coincidence that the traces and pads are so similar to the pins on the pot...thanks again.