Hello all, This is my first post here, so please let me know if I'm not in the right section, as I wasn't 100% sure if this was the right place. I'm making a box that can change volume quickly with an actuator for a small project. But I need to minimize the friction in moving the wall of the box. Is there a way to make a magnetic track for the wall to 'slide' on? I don't mind if there are boards sticking out the back of the 'wall' to help balance it (I was going to put wheels on it originally), I just need the inside of the box to be box-like. I've seen small projects like this: http://www.miniscience.com/kits/maglev/train.html What if I basically made a track for the wall like that, placed magnets on the right and left so that it wasn't touching the sides, and pushed it? Would it get stuck? Is there a way to maybe produce two rails that could attach to the wall that would have nearly no friction? Like below? Thanks!