I just finished my Micro SpeedWing with a 4200 brushless, T-Bird 9 speed control, AP 2s 400 lipo and micro servos. AUW of 3.9oz. A little different to build with carbon fiber tape, and everything being so small. Not a big deal though. Balanced out perfectly the first shot. I did hang the battery on the bottom to be able to swap to different sized packs. Flew perfectly on the first toss. Flies like a larger wing and handles a stiff breeze very well. Can't wait to get off work and burn up another pack.