What he said. After testing a couple of powerplants out in the TFX, I've come to the conclusion you need at least about 16+amps to 3D well. The 1320 is a great match for this size airframe. 11 x 4.7 SF props are a great starting point. So any setup within those specs should perform well. Just try and keep the weight to 18oz or less and you'll be rewarded with some spirited 3D antics!