Using a kk2.0 board with 3 dt750 with Davids wire mod, 11x4.7 props, turnigy 30 esc, 40c battery, Just will not fly, gets light on the floor but just not enough lift All posts say this should fly on half throttle, I'm on full and no go, Tried the esc to motor timing makes no difference, I've recalibrated the esc several times on and off the board, everything is working as it should, if I give it full throttle, then move elevator/aleron control then that arm lifts as it should, tricopter weighs in it 900 grams without the battery any ideas ?