Wheels. Wheels and rails, but really, wheels.
Really, determine scale. Once I have the scale figured out, I can go from there. Scans will be determined by book size, bottle size, and the masses there of. Once I have that figured out, build the first trolley, add wheels, add rails, and start running up and clean the tracks.
I’m considering a roller coaster style hook system for steeper inclines. That will probably be one of the easier things to jankineer.
Peter's stuff.