Don't have one, but likely will have one soon :)
I like the concept. Have jury rigged similar over the years with light cables, rollers and angles. But they are always a PITA to set up and don't always work well. Best ones I jury rigged were released when a popper was dropped (pulling a cotter pin releasing the mover). One use then have to reset it all being the biggest PITA.
This looks cool, will check it out more, thank you for posting it!