Ok, so I am now officially hooked on ProductTank Youtube Channel. We shared his Super Tripod yesterday, but had to go in and look at more of his work. (Be warned, if you are the DIY type, this is a black hole for your time).
This time, I would like to focus on his slider. Just like with the tripod, ProductTank challenges who a slider is made. Instead of running a cart on two aligned rails, he uses a guided surface to push a cart.
While you may wave this off as too simple, I think it is actually quite clever. The mechanism is built around pressing the cart to the plate on while using a guide that you can slide along. So firstly, you automatically get two (or more) moves; a regular sliding move, and an arched sliding move. Secondly, you get just the right amount of friction to get a smooth motion even if you detach from the guide.