Ah ha! Cheers Albi, I will give that a whirl. Didn't even think about using a socket head to pack it out with. I'll give that a whirl in a moment when the wife takes the dog out (freedom vouchers ensue). Will report back soon.
On another note, I am only removing them for powder coating, if I had known I would have left them but the general reason I saw for removal on other forums was to prep for coating. Damn!!
You live and learn.
Kev