This is a cover for the Matrix included with Hackerbox 123. If you want to print multicolor I have included the 3mf file, which was exported from Fusion with the front panel having a separate body for the diffuser. If you are going to print single color the STL files are what you want. The back cover can be used alone, as it should keep the custom PCB secure to the Matrix. Just use 4 m3 screws to hold the back cover to the case. I think I used m3x8 screws. I was a tiny bit off with 2 holes apparently, so you may have to use self tapping screws on two holes, or just use only 2 holes. If you use the front cover you will need six m3 heat inserts. The front cover is not necessary and is only used to hold the diffuser.