well did 8 flights 4 with the 1st gen h520 no issues then did 4 flights with h520e first 2 with e90 no problems. last 2 flights with e30zx first one had no issues with unit. the final flight though had the h520e in for final landing the unit close to equipment is used to carry it out hit 15 percent then unit went rtl landing skid lifted aircraft going backup unable to change pilot modes scrapped few tree limbs came down hard lost 2 arms one of which I do not have a spare for. That one has antenna on it. lost the landing gear glad I used the ball pads instead of orginal landing skid pads. gimbal mount looks good but has damaged wire going the the odfm unit. odfm unit was unscathed. new internal frame needed. cracked the glass lens on the inside on the e30zx .