I got the Postcard and Portability Shield and then printed the STEP file from the documentation. It was not thick enough and looked hysterical.
Then after a whole lot of googling I found that the RTK Postcard Github page has a thicker version of the enclosure. Sweet.
But then I found out it was the entire enclosure in one piece. The designer notes said it contained two STEP Files. Aha! Just got to split them.
I made a video showing how to download and split the STEP file for 3D printing. Hope it helps someone.
Splitting the Postcard/Portability Shield STEP File For 3D Printing
