I customized an OpenBuilds V-Slot linear actuator into a motion controlled camera slider. It's designed to mount to a camera tripod but can also sit on a surface thanks to these legs. They're designed for the 20x40mm V-Slot and work pretty well. The feet are meant to be tapped 1/4-20 and use levelers or gliders. In Fusion360 I incorporated the McMaster-Carr 2284T51, but any will do.
This is a revised version, when I tested the first version it proved to be a bit too narrow to be stable.
download the Fusion360 object here https://a360.co/2Jox6FM
if you remix please share!