I recently build my DJI F550 with stock ESC, Motors and 10" propellers, wookong M, x468 gimbal with GoPro H3, 2 2.2amp 11.1 3S batteries in parallel, Boscam 5.8 ghz FPV, and Futaba T8FG. Everything was OK, Fly nice, but with a lot of vibrations and some instability. Then I change the stock...