I just finished a pair of Hackers. One has a Norvel with a 6x3 and one has Tee Dee. Covered them with scraps of low-temp covering. I have flown the Norvel powered one. Running the suction tank and found out real quick that it would turn quick enough to kill the engine. Never flown combat and most likely won't, but the Hacker is a blast to fly. I'm got them so my son could learn the stunt pattern. I like it!