Quick remix of an excellent design. I increased the thickness of the lid by ~3-4mm, to give enough depth for the text. I included the blank if you want to create your own custom inlay.
Follow the steps from this YT vid to create your own custom text: https://youtu.be/4wddTDcO8oo
I embedded the text "carveout" 3mm into the lid (using tinkercad) and sized the inlay at 2.75mm. My lettering still stands proud by a very minor amount.
I printed the lid at .2 layer height, facing down with supports for the inlay area. The support material can be coaxed out with a small screwdriver.
When embedding the lettering, gently seat them while supporting the lid from behind to where they're all ~1/2 way in. Now turn the lid upside down, place on a hard surface, and press down. This should fully seat the inlay.
The case bottom is the exact same from the original thing. Posted here for completeness.