Well, I have done a bit of on-line research in the last couple of days, so I know a bit more, from all of your web-sites and posts to various forums. The spring, clockwork gear train, and release mechanisms all work on my #6 back, although they need a good cleaning. I can't tell yet whether there is excessive wear. It is quite noisy, mostly I reckon, from the fan drive-shaft. The run-out appears rather large, though I have not measured it yet. It may have a slight bend. Also, I wonder if it will run more smoothly with a fan attached? So, I wonder if someone who has a fan type governor could post a picture or a link. I was unable so far to find a picture of the fans.