Download link? Sorry, there is no download link on discord, only on Patreon leading to Itch.io.
As for the restraint chairs, you are right, I think around some version during transitions I switched them out. What for 18.1 is try to randomize punishment cells so one goes to hypno ring , the one after goes to Tech Horse , and so on and so on. These updates are more set on showcasing the new feature. But slowly I create a feature that brings everything together!