Originally Posted by Steve Bowers
I had an EV for a while and found the same problem (they should have stuck to the two post's)
I made a thin rubber washer just smaller than the ball and fitted it into the ball cup.
You will also have to get a longer screw to make sure you use all the thread in the hole.
It's also a good idear to change all the 6mm screws fitted as standard from "button head to socket head".
And plated screws are better than the stainless ones fitted.
Hope this helps
The stainless on there is likely to be A2 grade (304) which can be soft, upgrade to A4 grade (316) which is harder (more chrome in it)