This is a toolbox I designed to understand linkages (found out they're pretty easy but also very easy to overthink about ). And ended up making it out of sheet metal now I'm sure it could be printed for 3d printing accessories it may need scaling to fit on a printer but I had a lot of fun making and designing it and hopefully will have enough time to make a lid that'll close the whole thing when you lift it. It does use 24 bolts and nuts with washers but this was a while ago and I've forgotten what size they are.