Steve ~

Also make sure your spindle isn't bent.... You can roll it on a piece of glass to test it to see if it still remains "true"... Also, like most metal heads, just because there metal doesn't make them bulletproof... It just means when they take a good enough hit, they bend instead of the plastic just flexing, or eventually even just snapping... Even on my little Trex 450, in 5 crashes, I've had to replace my Microheli CNC rotor head twice now.... And the one that's even on now, I've bent back already a couple times. Metal is nice, but just more expensive to fix from those bad crashes especially from a pilot who is learning and crashing all the time... And the Microheli stuff isn't the greatest anyhow, as like others have said they use a very soft metal... [:-]

The best way to check if that rotor head is bent, is just stripping everything off the main shaft, but leaving just the rotor head to see if it still spins true and without wobble. A good set of digital calipers is also going to be something your going to need... For one, you want that flybar that you installed to be PERFECTLY centered as you installed it back on... And then, you also want those flybar paddles to be PERFECTLY centered also as you measure from the end of one to then the flybar cage... Everything has to be perfect, as that heli is spinning its rotors, and nothing can be off or else...... It all matters.... Trust me....


Hope this helps some,

~ Jeff