RE: reversing El. servos
As long as the trims work equally when the servos are set up on different channels that method works just fine. Some systems don't match the trims. That's where a Matchbox, Equalizer, or the Futaba specific products shine. Reversing Wye harnesses often have their own issues with different speeds and trim changes as they heat up. A reversing Wye harness is for me not the way to go.