Mechanical Slide

Wanted to make a mechanical slide that didn’t cost hundreds of dollars! HA! Anyway, I think this is a pretty simple design; mainly made from 3D Printed Parts. Not the quality of an OEM Slide but works none the less. Other than some screws and nuts, has two main OEM items to purchase. One, 1/8” Brass U-Channel. It’s pretty cheap and you can get it at most any Hobby Store or online. Two, need 1/8” diameter steel balls. I got mine online but should be easy to get.
Other than that, this