I definitely have the same problem. I spent a lot of time with alignment and polishing the starter shaft bearing race in an attempt to free up it up from the one way clutch bearing without success.
The diameter of the starter shaft race is 9.95mm. Have you come up with any soiution/smaller diameter to free up the start shaft from the clutch?
The start shaft can be turned independently of the clutch but it is very tight and will undoubtedly spin while the engine is running.
Thank you,
Bob