yeah at 66% percent my walked all over the place and then I spoke with a few folks and they told me that they increased the gyro gain and then that cleared up the issues I even went as far as contacting E-flite because when I bought mine just before christmas the feathering shaft was bent right out of the box and I had horrible wobble as I spooled up. I also read that part of the delay with the release of the heli was in part due to the Gyro giving them issues so even upon buying the heli I was prepared for the worst but like the rest here the more helis in the hanger the merrier.