Mmmmm ...... very interesting.
That coil of A-teams seems a bit worse for wear ...... don't treat mine with kid gloves but that looks like some serious ground bashing, or maybe something heavy caused the issue (???). Usually any excessive pressure would tilt the coil at the shaft screw. Have you had the coil since new and how old is it ?
Haven't had an issue (as yet) with my 14" .... apart from the deep targets that stuff me digging them up.
Have however recently had my 11" returned for a check up ...... couldn't get the thing to shut up, noisy as (while the 14" was running sweet as) ....... don't expect a quick response due to crappy mail service at the moment but will be interesting to see what they say.
Hope your issue gets resolved, keep us posted.
Cheers T.