I put a stihl 23cc conversion on a 4-star 60. It needed about 2-oz tail weight. It flies great. I am learning to hover it. It also fits inn the back of Ford Explorer with the wings on. This is a big plus.

My bigger stuff can be a pain to transport. Consiter carefully transport issues! I have a 1/4 scale Fokker D-VII to be finished soon. I am not thrilled about assembly and disassembly. It will have to be broken down to transport, reassembled at the field, then broken down to transport and reassembled to store at home. I did not fully conister it when I bought the kit.