I recently picked up a DR2a, very pleased with it, i am.
The DR1 in this video is its bigger brother?, a 16 bit version with midi control of the presets, it sounds a lot cleaner than the DR2a, which, with its limited controls, forces your decisions a bit more. Both sound good, but different.
The chassis transformer was outputting 9.1v - 0v - 9.1v in circuit. So i got a 230v toriodal transformer with the same voltage output, and slightly larger current capacity. everything is working fine.
I want to fit a front panel on/off switch next, but it means a diagonal run of 240v tight to the main circuit board.
The front right of the "Front Panel" is the only place with room to fit a switch, transformer is the left rear. Before drilling any holes i will "dry fit" the switch, and see if the cable run is generating any noise.