I just finished one channel on these. Just thought I would share. I may add a purple heart face plate to each of them, but I am not sure. It is the Poseidon schematic, but Point to Point, so I did not put it there. That board was at my local surplus shop for fifty cents. Makes a great narrow cap board. I also pulled the multicap and added another bias pot for individual bias. The drivers are mounted to a piece of 1/4" plexi that I plan to light up with an LED eventually off the filament winding. Turned out really nice even though it is sloppy:)
The best part is that I have less than $300 in the pair.