I have access to a laser cutter, this is exactly what I had in mind - to create a set of masks that would, layered upon each other, filter out each part until t

I have access to a laser cutter, this is exactly what I had in mind - to create a set of masks that would, layered upon each other, filter out each part until they're sorted. Rather a large effort, though .. and I wonder if there is a way to model this without having to laser-cut a lot of test pieces. Well, I think about it every time we end a Lego Mindstorms session in my house, anyway .. ;)