Just to be clear, in my previous post I was not trying to imply that the mechanic does not know DSMs. I was trying to provoke thoughts & questions that might lead to finding the problem.

It's obvious there is some confusion and/or communication break-down because the information I'm reading here doesn't make sense!
e.g. "I don't know what the problem is so we're gonna replace $2000 in parts and see if that fixes it."
Maybe the recommendation was actually for a new clutch, fork & ball - that makes perfect sense because if the transmission is on the floor the rest of the system should have checked out OK