It would probably be good to get some twin experience before you leap into scale. You need to learn how to keep 2 engines running and how to use the rudder before you fly a plane that is going to be more critical than a sport plane. For an ARF twin, you have the already mentioned TwinStar or the Cedar Hobbies Twin Stick. For a kit, you can't beat the Northeast Aerodynamics Twin Air 45. Another idea is the Great Planes Profile-38, a profile, mock P-38 kit.

Pick yourself up one of these and come on down to Pensacola on Septenber 10-11 to our twin meet. See the flier at the top of this forum. There will probably only be sport fliers there since the scale guys tend to fly at their meets rather than mix in with ARF pilots, so don't expect to see an example of your future project. I do have a twin fuselage plane.