That is heavy for a Kadet. Mine weighs less than 5 pounds and with a 46 you have to stack about 5 washers in the rear of the engine to angle the thrust down. The climb is astounding though. Wit a K&B 40 it has enough climb but on a hot day you will have to let it gain airspeed right after take off, afte that it is fine.

Are the ARF's usually that much heavier than the kit versions? I understand it is a sport version but that is easy to do with a kit. Adding ailerons should't add much weight, in fact mine has ailerons, taking out the diehedral adds no weiight, and converting to a taildragger should reduce weight.