Remixed the main button so it can be installed on a Skywatcher Crayford focus button.
If you want really smooth operation, check out the anti-wiggle needle mod here: https://www.printables.com/model/1138512-crayford-reducer-v2-anti-wiggle-needle-mod
NO PERMANENT MODIFICATIONS are made to the telescope.
Consider putting supports.
The author remixed this model.
Specific plate attachment and specific button to use on Skywatcher Crayford Focuser.