As Lakeshore 3rd Sub said the article in 2001 MR used an elevator. I built the one pictured. I threaded an oak dowel to raise & lower the platform. I have an old car power window motor that I will probably use to replace the hand crank. I am also thinking of replacing the elevator with a helix. This is in an ajacent room so it doese’nt take away from my RR space.
The simplest train elevator I’ve seen was made out of a large scissor jack (like the ones used to jack up trucks) and a power drill. The drill was connected to the jackscrew and had a step down transformer on the power line to keep you from elevating your train at warp speed. The drill direction was simply reversed to raise or lower it. Just drive the train on, hit the button, and drive off…simple.
I’ve seen the display case elevators and those are cool, but much more complex.