Montague is right. And, he was referring to using a Y harness. If you use two different channels, then you could use the epa for differential, but with two channels you have to make sure you plug them into the same channel each time. Y harness is much simpler. It's all I use, so far. I'm sure I'll eventually use separate channels, if I want flaperons or something, but so far, that hasn't been necessary.!