Hi,
Now I maybe have found a simple and quick fix of my slipping focuser.
I have done a simple test if I can increase the friction with just sandpaper glued to the steelplate. It looks to work very well, maybe it will not last forever but then I just glue a new sandpaper on the steelplate. The sandpaper is a replacement for the diamond shape surface.
I hope I can do outdoors test in the coming nights.
Here is a bit more text and photos:
http://www.astrofriend.eu/astronomy/...-friction.html
/Lars