At my last service, MMC told me that the front c/s oil seal was leaking and they replaced it under warrantee - I did not even have to ask.
But it still leaks!
Spoke to my dealer today to book first 1000 mile service and to discuss the leak, which although modest is still there (spot of oil on garage floor after every long run). He suggested that my problem is not unique and that MMC in collaboration with S & S may offer an improved seal in the future.