I would imagine that with the many high value pieces on the forum few would tinker with them but do many "play" with the less expensive items? Personally I have been slowly getting more involved and moving from cleaning/servicing and today finished my first strip down of a Landeron 48 Chrono, nothing seriously wrong with it apart from a pusher that required a bit of work. So stripped, cleaned, rebuilt (no parts left over) lubed and running sweet. As they say it's an ugly wee b****r but it deserves at least half an hour wrist time.