That is almost exactly what my GP Giles 202 would weights in at with MDS 1.48 for power. Using standard size hi torque servos, mini on throttle and NiMHi AA 1600 bat. pack. Just hard to keep them from that 12 pound mark. You can slow down a lot for landing by using the ailerons as flaps which are set up in the landing mode of most computer radios. When swithched to landing mode the ailerons come DOWN below a certain throttle setting. You can also couple in some elevator the help neutralize the pitching tendency. I have not heard of any bad tip stalling tendency on this plane....even with dead sticks. Are you sure you are not a bit too much on the tail heavy side?
PilotFrog