Hi guys..... I had a crash the other day, then I overspeeded the heli withouth blades and the tail belt overwarmed and I had to replace it, now I don't know what is happening, my t-rex's tail is wagging (goint left to right) very fast when I give some rudder to turn the nose (either left or right). I have a gy401 with 9650. it's very stable, I mean, the heli is straight all time, except when I give rudder, right after doing that, the tail starts wagging very fast (but not so open, maybe in 5cms) for maybe 3secs and then is stabilizes again.... what is it wrong?????? Thanks.

P.S. Each time I give some rudder, the light of the gyro starts flashing and then it stops, is it normal???? I have it in HH, 72% (it was working perfectly before)