I’m an elevator geek so I built in roblox an elevator with a safety mechanism based off of Elisha Otis’ design from 1853 in which if the cable fails, spring-loaded arms lock into grooves in the side rails preventing the platform from falling right to the bottom. Here is a video showing it in action. Built using 100% constraints and parts.
I’m also making it open source. So feel free to improve upon it provided you credit me.
(Link in post #3!)