You should not need to turn on the support material setting in your slicer for any of these files. The Chassis file has two “print in place” support features included in the 3MF.
Materials:
1x XRP Board
1x 9V battery
2x N20 motors
1x Barrel Jack cable
2x 0.5in Nylon Ball Bearings
Two wheel options:
2x Print the wheels and use O-rings for the tires
2x 32mm N20 wheels (available from many vendors, like ServoCity or Amazon)
CAD design is open source on OnShape!
The author marked this model as their own original creation.