Thanks. I already asked him and the response was that it was not something he could help with.
From what I see the threads are still there on the tube. I have a a parts 6010 coming from Japan in a week or so. The first thing I will try is swapping the crowns. I also have a 7010 that just arrived from servicing that I could swap the crown from if they are interchangeable.Do you know for sure the crown tube’s threads are stripped or is the crown’s threads stripped?
Have you tested the screw-down with another crown to validate? Worth a shot.