Ed, sounds interesting, BTW I went to the Cocoa Bch area, had a great time but took only land planes.

Here's what I put in my first post, above, about counteracting engine torque.

"I recommend slight upwards thrust on both engines(3-5°) and outward thrust on each(3-5°) if you want to counteract engine torque you can reduce the outward offset in the right engine a little and increase the offset in the left engine."

Obviously the best solution would be one normal rotation and one counter rotation engine.