308 engine problems

I've never worked on these type of calipers before, BUT, I am told they are a real effort to get just right, and that to do the job properly, some special tools are required. We get a few calls asking for rebuild kits, and almost the same number of calls asking for specialist advice. We have the former, but not the latter. I'd contact Martin from Girodisc (site sponsor) and see what he can tell you. This is not something you'd want to get almost right