ORIGINAL: opjose
ORIGINAL: Big feet
Try some thread lock, should help.
Maybe...
I see everyone advising against thread lock on the prop shafts etc least they be impossible to remove...
As a result I've never tried it there... since I heeded the advice.
There are a few different strengths of loc-tite. Don't use the, errrr red one, I think. It really is lock and forget stuff. The blue one is used to prevent a nut/bolt becomming loose due to vibration, but you can easily remove it when you need to. Check the different strengths out, I really can't remember which is which off the top of my head.