I did the pitch gauge reading and it gave in -2 at mid stick so i adjusted it to 0 at mid stick and full stick at +9 and full down at -8. I try it out and still nothing, it wouldnt lift off, but i got something that happen. out of nowhere it got a bad vibration, that it started to move around on the ground but wouldn't fly. I am clue less... ? the servo was my fault, i didnt see that i had the trims a little down. but i fix that. It looks like the vibration was that the blade that couldnt pitch up went down while the other was up. check out the servos and servos was good. not strip. have no ideal what to do. ???? thinking of just buying the whole head assembly and replacing the one i got now.