This is a remix of lytedev's 3D printed case design for Brian Low's Kialh Choc variant of Josef Adamčík's Sofle split mechanical keyboard. lytedev's original case designs used standoff legs for the case. This variant is nearly identical, but it replaces the standoffs with holes for threaded screw inserts. There's also a low profile variant of this design (as seen in the included pictures) which gives the case a uniform height. This design is a fun way to add a bit of color to your Sofle Choc, or to protect some of the exposed metal contacts on the underside.

This design leverages M2 x 3.2mm x 3mm threaded screw inserts. Here's an example Amazon link: https://www.amazon.com/dp/B07LBQFNQD To be clear, the inserts use M2 screws, are 3.2mm wide, and 3mm tall. The 3D printed case actually has 3mm holes in the design. To install them, simply place the insert on top of one of the holes, then use the tip (or side of a particularly fine tip) of a heated soldering iron to push them in. After a few seconds to get the insert warmed up, they should easily sink into PLA without too much trouble. Some special soldering iron tips exist for larger insert sizes, but you shouldn't need to spring for them here.

For the screws themselves, I used 6mm long M2 screws from this laptop repair kit. https://www.amazon.com/gp/product/B01FTI8TM8/ The heads of the screws are small enough that they don't brush up against the keycaps even when they're fully pushed down. I already happened to own this kit, so you may be able to find something with more appropriate screws.

Again, all the credit goes to lytedev's original design. I just put the screws to it, so to speak.