I had a minor crash with my king 2 and all that broke was a link and blades, and feathering shaft of course. I replaced all the parts and it seems like i have a tail vibration that i cant get rid of. I have tracked the blades but to no avail. They are wood blades from ushobbysupply. Is it possible that its the main shaft? It doesn't seem like the head is wobbling. Any help would be appreciated.