@M. Mitchell Marmel posted:Can we get a track diagram for this, please?
Well, it's dead simple, almost as elementary as Joe's inspiration: half-circles of O-27 curved tubular track, separated by several feet of straight. I'll shoot a short video and post it later today. Still working out the bugs (and will have a lot of repair and clean-up work to do!), but it does run pretty much as I intended.