Originally Posted by TomCrump

My Kadet Senior Sport is an ARF, with everything set at the factory. It wanted to climb like crazy.

The problem was that it needed down thrust, even though it wasn't mentioned in the assembly manual.

The OP's model may indeed be tail heavy, but I wouldn't assume so without knowing if it glides well, without power. If so, I'd look at thrust issues. If not, it could be decalage issues, as radiisteve suggests.