So, as of last night I managed to get the 7600/200 running and booting with one of it's original HDD's (the other is fubar).... turns out the failure to boot properly was a result of a bad DIMM which i have isolated to one of two that were installed years ago. This might go some way to explaining the random sporadic freezes it used to suffer when i still used it.

Unsure as to what I will do with it after i clean it up...  I have stripped the Radius firewire card and the USB card out of i and reboxed them, as well as taken out all but 40Mb of RAM at the moment.The only non-standard parts are the added VRAM modules now.

I also happened to drag out another 7600 I painted black many years ago... this is likely to supply a donor logic board to resurrect my WGS 7350/180.