The documentation for building a basic tricycle chassis LoCoRo (low cost robot) is complete along with the design models and printable parts!

a production LoCoRo with 3D printed parts
a production LoCoRo with 3D printed parts

This unit has been assembled using all new electronics and 3D printed parts. The total cost of this example was $71 USD. With the addition of a camera or other sensors, it will still be under the $100 goal.

For those wanting to see it in motion, watch the short demonstration video.