This is a bit of a long shot but if anyone out there has a Cheetah MD16RP (the 2 unit rackmount version of the MD16 with trigger inputs) or knows anyone who has one, i'd be eternally gratefull if you could crack it open and let me know where the wires from the trigger input board attach to the main board.
On my machine all of the connections between the trigger board and the main board have been disconnected and i have no idea where to solder them back in. I've even gone to the extent of buying schematics and service notes from one of the original cheetah design engineers only to find that the trigger board shematic isn't included as, in the words of the cheetah engineer, 'as far as i recall that was designed on the back of a cigarette packet in a pub'