Hello, I also have one of these Yak's from Willhobby.com. It was a challenge to build. The manual is good for starting a fire, that’s about it. I am having a hell of a time with getting the CG set. I am running a SPE 40cc gasser and am going to have to add a ton of weight still. I even put my batteries and receiver up front. Overall, the airplane looks great, hardware sucks, and cowl is very brittle. My cowl was damaged in shipping and Jerry at Will Hobby agreed to send me another one. Haven’t flown her yet, but looking forward to it. Does anyone else have this plane? If so, what did you set your CG too? Thanks