Its sealed on that model. Oh well....... Hope he's OK, but somehow I doubt it. Either that or he fried it. Its easy to fry something like that and shock yourself doing it. The second I saw "I modded it for single phase" I got worried. That is a switched resistor 3 phase PSU, I have a feeling it would not be happy being hacked.
The messy basement has mental health connotations. I know, cause thats what a shrink said when she saw my piling system.
Would you fire up a system with a new cost of 16K$ in that mess?
Steve