You did fine getting the Futaba 7C and 617 receivers. I have two of the xmitters and a dozen such receivers in my little air force. They will take you far and knock on wood I have never had a glitch using them the last 5 or so years. Re engine, I have a Giles 202 that is 72" WS, just a little larger than your Dalotel, and it flies real good with an OS 160FX. I think that is more equivalent to a 30cc. My plane is 12#. If your Dalotel is around that weight, just keep an open mind towards a little more than 20cc. It might do fine, but like most, I rather err on the side of too much power than too little. Just another 2 cents. Jon