I have six epoch I 's and one has been down for at least a year ( since we took over contract) and was probably down for a year or so more. The car has been used as a parts car but I think I've almost got it running again. I've had the MVR, mfr, and two levelling boards repaired. I've repaired the door operator board, hoist motor fan motor and replaced the obsolete 33t delay release relay with another type of relay like it. At first it would start into high speed and then slow down and stay on inspection speed until it reaches a floor. All the pots on the drive control boards had probably been messed with by previous mechanics. I have prints and manuals that give me info as if I had a mg set or some other type of drive. This drive has a card rack with seven color coded boards and a back board with pots r1-r16. I know all the boards are good except the purple one which is currently being repaired. I have ohmed out and matched all pots with another elevator and borrowed its purple board and it will run high speed but doesn't slow down except at ets points. Does anyone have info on the adjustment of this type of drive. It seems like I've heard before that these controllers are some type of epoch I hybrids???