I used MonoKote for the covering. Cloth or Coverite would work out very well due to the curves in the fuselage. The structure is quite strong in all areas, so any covering will work fine. Due to the lack of reliability I had with the BGX, the engine was sold at a fly in. The plane is now hanging from the ceiling in my shop without an engine until I come across a gasser for it. That's going to be a pain since it was built around a glow engine. I haven't settled on a size yet, but something that would match a Moki 2.10 would be about right.

Change out the balsa spars in the wings and substitute bass or spruce. It increases the wing strength tremendously with little weight penalty. If you want a 3D plane it will require increasing the span of the ailerons to get them into the prop blast. That would be quite a bit of work. The elevators and rudder are quite plentiful as they are. Two servos is more than enough to handle the ailerons, one for each aileron pair. Your servo choice will be fine.

I never weighed the plane and I'm not in a position to be back at home for awhile, but the neighborhood of 14.5 to 16 pounds is in line.

It's a builders plane that requires a bit of work, and possibly replacing some of the balsa that comes with the kit, but the flight qualities of the plane more than offset the effort. You'll like the plane a lot.

Pat