Continuing on with the power section. I screwed the steel shield to the chassis floor and threaded the PSU wires through... ...and then undid it all again because I realised I needed a couple more holes! Everything back into place, the wires were (hopefully) cut to the correct length ready for tinning before being soldered to the PS-21 PSU board. The green wire carrying 6.3VAC for the volume control PSU wasn't long enough, so was extended. Also, the circuit ground wire was attached to the chassis near the rear panel. This would also be connecting to the PS-21 board.