I cant post int he other forum my fault, I know.. But I have your solution to your compressor try this. Disconnect the signal line from the regulator of second compressor. Splice in the signal line for from regulator one to motor #2. (you willneed a relay to trip the second motor. This in turn, will make both motors run at the same time when the regulator tells that it is time to turn on. When it reaches the preset level, both motors will shut off. Even if they are of different capacities, the lines will self equalize and go to the side that needs it the most.