Project Monorail is an attempt to recreate a design shown by Nicholas Seward (https://www.youtube.com/watch?v=oBBhVcemVHc&t=26s) that uses 1 linear rail to accomplish 3 dimensional movement
Use this to visualize if a point is reachable or not to prevent issues: https://editor.p5js.org/Happyrobot33/sketches/HqeGeLe6U