I made this box to hold my LCR board, which I find an amazing piece of tech, and insanely cheap for what it does. I wish I had one of these decades ago…

The pieces are printed with only minimal supports from the build plate and in the orientation shown on the photos.  The button bezel insert allows a clean print, since the top is now flat, and the button bezel just snaps in. I printed this in California PETG, but almost any filament could be used. 

The assembly screws are M3-6mm and can be directly screwed in the printed parts, but the battery case needs to be tapped. NOTE that there are a number of LCR boards, and yours may not precisely fit the screw holes. In that case, just put a glob of silicone glue on the screw pads and drop the board in. Or, you can also inject hot glue through the screw holes when everything is aligned. There should never be a need to remove the board from the box in any case. 

I have included STEP files for those who might want to modify the design.

The solder pads between the button and the socket are for mounting an IR decoding module; since this board didn't have one, there was no need to expose the pads.