Eakins Microscope external switch for auto/manual focus control

Microsoldering under a microscope becomes even harder, when you need to put down your tools to switch between Auto and Manual focus, with a mouse in a chunky UI.
Using an external foot switch is much easier.
 

This project builds on top of the fantastic work of charliex:
https://charliex2.wordpress.com/2020/01/14/eakins-camera-hackery-pokery-and-the-legend-of-measuretwice/
https://github.com/charlie-x/eakins-camera

Fusion360 editable files included.

Microscope controller software for the esp32:
https://github.com/lmjohansen/MicroscopeController

Hardware used:
Eakins microscope kit with lens (no storage) https://s.click.aliexpress.com/e/_AD9Xt1
Esp32 board https://s.click.aliexpress.com/e/_9yT49d
Connectors https://s.click.aliexpress.com/e/_AE4WYF

See makes and Comments for more details