Hello ,
First of all, very well done on the build. yours is one the cleanest ive seen. I am too in the process on making my own MCDU, ive finish with the PCB , faceplate and programming using Mobiflight. The only thing I need to do is the keycaps for the MCDU and the housing.
Can I ask though, what method did you use for the keycaps? I am thinking resin printer then etch with laser for the letters but some recommended acrylic. How did you create yours? Thanks