Some wardrobe hangers set on a couple of Push up bars are the foundation for this pretty slick DIY motion control slider by Vimeo member Jayhas. A wireless RC remote and continuous servo control the speed, and the basic rig is comprised of a few skateboard trucks. I think I have a good idea on how it all works, but there isn't a very clear tutorial on the build. Hopefully we'll see a follow up with a closer inspection to how it was all assembled. You could find some additional information following the link.