I took these pictures some time ago, but just now posting. These are basically the construction of the X axis assembly along with some of the bearing blocks.

Lots on the forum are tapping the mdf and using screws, I decided to go with Conformant Screws. I’ve used these on other projects involving MDF and the work really well. You just need to make sure you drill the holes straight.

McFeelys.com has a great starter set. I’d recommend that for this project or any other involving MDF boxes.