Check out www.instructables.com for 3D printer projects
Some projects exist that use adruino micro-controllers
The main coding challanges are stepper motor controller, heater controller, convert G-code to stepper motor instructions
Look up mini reprap (repeating replicating)
In a regular annotation note, create a stack that looks the way you like. It will take a couple of trial and error attempts since there'...
Modifying profile of footing so that the notch shows up between the footing and the base of the foundation wall. https://youtu.be/0MPkykiWu0o