It's case for this device:
Doesn't need any support when printing (you will need rotate the top case by 180 degree), tested with PLA and should be fine with ABS or maybe other materials. All buttons, switches, LEDs and everything needed are easily accessible. While having decent protection (it's not waterproof, or something like that, but should be enough for carrying in your bag). You can screw the board to the top part first (using the PCB holes close to the CPU), then add bottom part of the case which then can be screwed to the default standoffs. Both top and bottom have a small lip which overlaps so the whole case snaps together nicely and keeps both parts from moving around. Sides have pretty big holes so it's easy to use finger to interact with everything and act as wents, so the board will not get hot even after many hours of usage. The intake wents are big enough to pass enough air in (the fan is fairly small and has almost no flow in the center so there is minimal penalty of creating a protective cross for the fan) and are small enough for fingers to get into the fan and hurting yourself or damaging the fan. Similar for transport it will protect it from big/blunt objects, but it's not trying to be a foolproof case, if you want to take a screwdriver and push it into the fan, you will be able to.
If something needs to be tweekead, original parametric solidworks file is included as well.
Having high infill will not affect print time as much as a lot of stuff will be pretty solid with default 3 perimeters, 3 top/bottom layers settings. I would recommend using 4 perimeters just so the outer casing will be completely solid.