Folks,
   What size plane would a .40 LA OS suit for 3D and aerobatics. I built a mini-3DX (foamyfactory.com) with a built up wing using 3mm coro. BUt the plane feels a bit heavy (not weighed). Wondering if the brand new and un-used and bought a long time back .40LA OS engine (for my tower hobbies MKII trainer) may be of any use here. Haven't read great reviews of this engine, but surely there must be a plane size where this engine would be good for 3D and aerobatics.