RE: Hk600 tail not holding
My opinion on Align gyros are not good. I would trash the gyro and get something better. If you want to go the cheap route, I use the Asan GA250 which is a spartan clone. I've had great success with it and is very affordable. For the more expensive gyro's, my choice would be the Spartan Quark. I used to really like the Futaba GY520, but I've had two failures and replaced it once.