i was building an IoT device (internet of things) using a Amica (Nodemcu v2) and needed to do the final assembly so I used an SB400 prototyping board. The case will neatly fit an SB400 plus female headers plus micro controler on it plus about 3mm gap vertically. horizontal gap is less than a mm. I've successfully printed this and am using it now. It's designed to the opening is at the bottom so that any moisture can go out the bottom. The end cap fits snug. Suggestion if you are using simplify3d change Y has to 90 degrees and then use Edit/center and arrange feature. Then you are ready to go.

Robo 3D

R1 ABS + PLA Model

No

No

0.2

100%

I used white colorfabb XT at 0.4mm nozzle and 100% extrusion at 250c/60c (with PEI bed which it doesn't like to stick to) with 0.2 layer height make sure the same layer height is used for both pieces so the layers cause a snug fit. Note I have a ed3 v6 nozzle.