A generous spraying of WD-40, and four bruised fingers later, I got them removed. 
Mixed feelings about the case, as it means removing four* mini screws and two knobs to move the faceplate, to remove one of the side panels, every time I want to change the SD card.
*(technically, three, as I’ve already managed to lose one of the mini screws.)
Long term, that won’t be an issue. But it could be a pain during the testing and troubleshooting part of all this.
More so, since I’ve got two or three separate projects I’d like to try with this hardware…