Servo Control Working, More CAD and 3D Printing

I got the mainboard to be able to control the servo on the servo PCBs. I also tested a bunch of the functions, like the magnetic sensor, neopixel LED, etc
The communication now sends the PCB ID, and the target speed and the servo PCB echos it back and moves the servo.

I also worked on the CAD (and refined) for the mainboard connector that will make connecting the two mainboards not a total pain.

I also soldered the connectors on the mainboard PCBs for them to connect to each other.