.:tracking installation:.

Anti-shifting screw

focuser
screw

- focus a star

- turn the screw carefully to the stop

- turn the focuser carefully against the screw (but not too hard!)

- now the mirror is fixed! and you can't adjust the focus with the mead-focuser (you need a second focuser assembly)

This is a little bit risky and I can't take any responsibility if something will be damaged!