Note: This is still a work-in-progress design and I will upload pictures and edits once everything is finished.
This chassis is designed to hold two micro servo motors that will be driven by an Arduino microcontroller (or similar). The included wheel design is a quick remix of one I had found months ago that works well on the servos I have. I would also suggest printing the parts laying down and with supports turned on for 70 degree angles and higher; this allows for the pegs to be stronger and straighter.
I do plan on making a video or instructional guide at some point in the next month so stay tuned.