Has anyone serviced a set of Ktec topmounts?

[alistairolsen]

I've got a set and the drivers side is knocking when on the ground but of course tightens up when you jack the car up so its taken a little while to find!
I see they do service kits, has anyone here rebuilt a pair? Whats involved?

http://www.k-tecracing.com/show_product.asp?id=2847&appid=2

Cheers