Looks great. You didn't think about a flap in the center? You don't need flaps, but you might use one in a crow set-up.

I would also think about holding elevator and rudder servo placement until you cover and install engines. You might need to move 1 to the rear for CG.

I found I needed something stronger than HS 81s on ailerons. They just weren't powerful enough.

On my twin fuselage Sky Raider, I used double servos-2 aileron, 2 elevator, 2 rudder, 2 throttle. You normally use 5 so this is 3 extra. I also split my elevator in the center and mixed to get them together a la dual elevator set-up.

Man, it sure would be something to 3D a profile twin. That is one sharp project.