Electronics!
I designed the electronics assembly and guider scope for this project.

The electronics assembly is an SKR pico with a Raspberry Pi 4b. I chose this pair because they are identically sized boards, so they stack well, and the SKR pico has 4 motor drivers, the exact number I need. The raspberry pi will allow for onboard plate solving/tracking control and lessen the need of always being connected to a laptop. I already own the pi and the skr pico is cheap enough. The two boards are mounting into one assembly and that gets mounted to the rear of the polar mount.

I also added HDMI to CSI connectors for the polar mount camera so that I can just run an hdmi cable between the mount and my electronics, which will handle the motion way better and be way less fragile than using a long ribbon cable. So that’s nice!

As for the guider scope. I am using an IMX290 camera sensor, a 182mm focal length 50mm diameter lens, and a custom wound carbon fiber tube for the body. This allows for higher rigidity and lower mass, and is completely overkill but it looks awesome. This scope is heavily inspired by the OpenAstroGuider scope but mine has a simpler focusing mechanism.