A small adjustment to the great tray created by @nvthblake – mainly a personal preference, but I prefer to have my icons flush with the top surfaces (less catching onto things, easier to view from across the table/at an angle).

FYI I'm not sure if I messed something up (kind of new to .step files), but I noticed that when sliced, the model introduced 1-2 layers of black right before the top layer for painted colors (e.g. for the robotics icon the layers would be “…orange>orange>black>black>orange”). It printed mostly alright, just that the robotics icon is a little messy, and the focus icons for trust came out still a little indented.

Good enough for me!