A bit of shot in the dark on this one. I am looking for the Devere 250 or 500 watt smpc power supply. I just finished rebuilding a closed loop head just to realise it apparently doesn't work with my transtab. If anyone has any leads it would be much appreciated I am tempted to just figure the pinout for the closed loop connector and the transtab and smash them together but ill give it some searching for the real thing before I blow up the 504 in frustration