Where is your throttle subtrim sitting? I know on my blade that I can push that up to half way and the tail will start spinning regardless of the main blades. If I keep pushing it up then it will get faster and the main blades will start to spin. Try setting your throttle/pitch trim all the way down and see if that keeps it from spinning. There is a fine balance of mixing and gain in these little birds which is why many add in a head locking gyro.

Your system may be blown but at least check your throttle trim, but if you can at least fly it then you seem to be able to have some fun. Play with it till it as long as you can or at least until you can upgrade or not stand it anymore. I am now adding in a G90 head lock gyro and a new receiver to my BCP. Good luck

Smiley