About this 3D model
Needed a little container to hold a vibration motor so that the weight wouldn't get touched. Also has a hole at the bottom to feed the wires through. Designed to fit: http://www.amazon.com/Amico-1100RPM-Magnet-Vibration-6x19mm/dp/B0087Y95X4 I wrapped a little tape around the motor to make it snug, which gives the spinning weight a little extra room.