EDIT#2: I updated the photo below with a full adder using only 3 moving parts that actually works. I'm still very interested in the even smaller ones you guys have figured out and the article which is so overdue I think I may have run out of drool waiting for it EDIT#1: Nevermind this design is obviously flawed. I figured out this adder just a bit ago, but I've heard there's a 1key alternative? play no attention to all the wires and the sackboy triggers in the background, this is in my test level...
Are you guys ever going to shed some light on your simple full adders?
