Marble Machine

Thanks for the Marble Machine files. Here is my version. I modified the base by adding some holes. Two of the holes are under the motor mount so you are able to screw on the mount after the parts are assembled. One hole is near the motor mount to put wires through to the Battery Base. 4 large holes around the perimeter allow you to snap on the Battery Base I designed. The Battery Base holds a place for a battery holder that takes 4 AA batteries. It also houses a slot for an on/off switch.