shimmed the focuser

I didn't like the action. The focuser was jamming after drawn all the way out. The little cuts in the top of the draw tube.

I backed out the tiny set screws. One was flopping around—clearly stressed from previous abuses. I wondered if a shim or sled had gone missing...

Added plastic shims to the "top" of the focuser casing. This greatly reduced the flop!

Ha! The shim material was "donated" by the old astronomy case α! The drawing action was smooth! Yes!

Very happy.