I went with a U Can Do 46 ARF as my third plane. After assembling the aircraft with an O.S. 46 fx powerplant, I found the plane to be extremely tail heavy. I replaced the engine with an O.S. 70 surpass ultimate (requires a larger engine mount} and the plane was still tail heavy. Finally got everything organized. On the maiden flight, the starboard stabilizer cracked off and the plane went into a death spin. Moral: keep things simple.