Caldera split keyboard case clippable design

This is a case for the Caldera Keyboard, designed by Christian Selig. All the details about the keyboard can be found here. You can also use Christian's original printable case here. The main difference is that this model doesn't use screws and standoffs. It uses clips on the front and back to hold everything together. This model is still a work in progress, but is usable. When printing, you have to choose between 2 base plates. One of the plate is angled to raise the back of the keyboard by 2mm, the other one is a flat base plate. I'm including the angled one, but to be honest, it's not the best. The main issue is that the added thickness makes it harder to unclip the base plate and open the keyboard, and the added angle doesn't change much in usability. That being said, I decided to include it anyway. I changed the rubber pad of the original design to provide more grip. I used this type of pad from amazon. Which files to use?I included both the STL and STEP files.