I've built two v-tail batbones (one is for a friend). The parts on both are NTM 28-26 motors, Turnigy Plush 30A ESCs, KK2 board with 1.6 firmware, 9x4.5 props on the front and 8x4.7 on the rear. The first one flies better than I expected, it is very stable and very easy to maneuver. Auto level works great on it as well and makes it even more stable. The second one that I finished today has a problem. The only difference between the two is that on the second one I used a power distribution board and the first one I made a custom harness, and I have the low voltage alarm hooked up on the KK2 board on the second one. So the problem is, with auto level on the gyros seem to go crazy and make it crash. It will hover for a minute but when the gyros need to correct, it goes nuts. With auto level off it works ok for a little bit unless I give it a bit of throttle. You can see it a little bit at about 0:05 with auto level off. I turn auto level on at 1:06 and it goes crazy at 1:13. The P gain and limit for auto level are both at 40, which is where I have them on the first quad I built. I'm hoping it's a setting or user error, but unfortunately I think it's a bad gyro. Does anyone have any suggestions?