well i took the plane out today, but it didnt go well at all. I think it was WAY to tail heavy[&:] even at the recommended cg, i put in around 3/4 of thro, and it wouldnt take off, just before it was the end of the runway, it shot straight up into a prophang[X(] i throttle up and it had excellent verticle, but when i went back to level flight, it was so0o awkward...it went up and down for no reason. i did 2 weird circuits and decided i needed a landing immediately, i came in, and the engine cut at around 15ft. and i pankacked it, the mount holding the landing gear broke.

so0o0 was it the cg which caused it to be like that?