My Homemade Crester is made from a Sewing Machine Motor, hooked up to a Dimmer Switch to control the Speeds. I just made a V-Block at the Opposite end with some soft stuff in it, and I used a Bohning Arrow Collet that fit the Diameter of my Sewing machine motor to a  T !
There are several "How-Tos" on here, but just some imagination and some scrap wood can get you where ya want to go! That and  NOT  wiring the Motor to run BassAckwards.     Good Luck to You!!  

Yeah I love seeing different setups. There are some really creative ones out there I've seen just looking around a little.

I've purchased a few tiny casters and rubber feet already. So far I have like $7 invested. Hoping to keep in under $20, haha.  Your dimmer switch thing is probably above my pay grade.  :D