This is an update on an old post. I went with a Y harness. It doesn't need much differantial, just a bit of rudder added with ailerons. I used an old radio that doesn't have flapperon capability. Still I wish I had used flapperons, that way i could get rid of that bit of tail wobble during rolls.

Jim_McIntyre,
Can you be more helpfull. Any source for axe handles? Or tips on how to make them?