Ok I have had my Pro for a while now. been able to fly ok, here and there have a problem with a vibration, no big deal, usually find it and fix it. this time its bad, I replaced the center hub/spindle which ever its called. Now its ten times worse, its a wobble now, nto bad till i put blades on it and it about shakes the tail off. Tried about 4 or 5 different shafts, all brand new, double checked flybar tack and balance, everything. The head vibrates noticeably with now flybar fins and no blades. Changed the bearings, no help. I think i have changed about everything except putting another new hub in. Trying to use HDX 300 carbon fiber blades, beginning to wonder if that makes the problem worse, cause thats when it tries to wobble the tail off. just got stock wood blades again but dont want to try them cause the vibration is still there. any help woudl be greatly appreciated

hrm... do you balance your blades and your flybar? If not, either take the motor off, or loosen the collar on the main shaft and push the gear down so the main gear can freely rotate. Make sure the swash is pretty much level, and put the heli on it's side so that the main shaft is parallel with gravity. Then spin the head with just the paddles on, if it stops so that one paddle is low, mark it with something that doesn't weigh anything (i usually just notice some white dot and the location of it on the paddle or something), repeat the process 2 or 3 times, if it's the same one that is low every time then you will have to make that section of the flybar shorter by sliding it back through just a little bit. Do this until the flybar rests parallel with gravity. After that you could spin it up and see how much vibration you are getting. If you are getting alot it's probably your main shaft, but I wouldn't worry about it at that point. Next do the same thing with the main blades, except use tape to balance the blades. Just for beginner balancing try to put the tape pretty close to in the center of the blade without obstructing the airflow too much. Once you have that done spin up the heli and see how much wobble you have. If you still have alot, double check the tracking, and if it that is good, then it likely is a main shaft that needs straightening or replacing, but also check for any loose parts.