i tried to keep my second project as small as possible, and i think it turned out pretty good (though i need to get rid of the tape that's holding the distance sensor in place)
it uses 4x cont rotation motors (each driving one wheel)
tell me what you think so far, ideas always welcome~
By cosplaying_bunny
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FYI shorter your wheel base the easier it is to turn with friction steering. ( wheels rotate opposite directions to turn left or right)