Dang, I was already thinking of that. You have to keep posting photos.

What engines are you using? I have a couple of Magnum .28s that individually run OK, but hardly ever keep running on a twin. We have had them on 3 different twins and can never count on a reliable flight. I had one of those on my Taco and it ran great. I also had an OS .25FX on the Taco and I'll get another one for a twin.

I did a twin fuselage Sky Raider Mach II and used 14" center line spacing. I figured 12" props max and 2 " clearance. It is an excellent flying plane. None of my twins is 3D, which is why I was thinking of a Taco, Burrito or Mojo twin.

I have also not had good luck with the Magnum .52XLS on a twin. Again, individually fine, but not very reliable with 2 of them. I have had good luck with the GMS .47s and OS .46AX on twins.