I'm glad that Schoeps does offer their service and sometimes it is reasonable, sometimes not.
I have sent caps in before and had them refurbished for as little as $150 or so.
But, I recently sent a GVC in. It was missing the special nut on the swivel and thought it would be a really cheap fix.
Well, they charged me about $250. So, after shipping charges it came to just about the same price as a new one $325.
It appeared that they replaced the whole thing and gave me a new one...or at least replaced some of the housing, but
I still thought that was outrageous.
Schoeps, it is a love/hate relationship....