I'll be using it to control the Mini Rambo board that is the main board for the CNC. The pi will basically be a g code sender for the unit, just like it's used on both of my printers. https://photos.app.goo.gl/rndw7KVZxCjkzekt1 Here is a picture of it a couple weeks back. I've since sleeved the cables and cleaned things up a bit. I'm having a lot of fun with it!