Are there any shop manuals online (this forum) for the C50's?
Not in or on this forum.
There have been some around in various other places but don't remember any recent reports.
Don't believe everything that you think.
I don't recall the exact link, but there is a C50 manual online. Just do a search on this site, and it should come up. I found it while I was looking for an M50 manual. It was a good, working copy. The M and C are very similar in many respects. I ended up buying one on fleabay since I never could find a good link for the M50.
Ill see if I can dig it up again and post the link.