You are correct, I am running separate ESC's. One plugged into AIL and the other in ELE. They both do not have mixing capabilities so I am just trying to do it on the TX. I've mixed the 2 channels so both motors engage forward and backward. I've tried setting up a third mix for the elevon and AIL with +100% and -100% but all that happens is one motor will turn on not both in different directions.

I hope this makes sense, I beginning to confuse myself :-)

Thanks