Orange Pi Zero 2 case using heatset inserts

The original model is excellent, but it requires screwing directly into the case, which isn't great if you want to disassemble and reassemble the case many times. This remix enlarges the holes so that it's easy to accurately position M3 heatset inserts in them, and also adds some necessary bulk to the sides of them so that the heatset insertion doesn't melt through the sides.

I also made a version to be used without an extension board, removing the extra holes for ports in the side of the case, as well as removing the two screw posts in the middle of the case. The case otherwise retains the same form factor, for compatibility with the original mounting bracket.

Also be sure to use the included lid model, which is modified to fit with the bulkier screw posts of this model.

Both versions of the case come in two versions: One for single-color printing (with an embossed logo) and one for two-color printing (with the logo as a sub-object that can be configured to trigger a color change). The logo shape is also provided as a separate file, should you need it.

There are two issues to be aware of:

1. In the model for use with the extension board, I was not sure where one of the middle screw post (the bent one, with the little shoulder at the top) lines up with the extension board. I think the intent of the original model was for the thin part of the shoulder to go through the hole in the PCB and come out on the other side. However, this part was way too thin to accept a heatset insert, so I removed it entirely. I think this just means that the fatter section of the post rests on top of the PCB, like the other screw post, which should be alright.
2. In the model for use with the extension board, I did not add any extra thickness to the sides of the screw posts in the middle. I wasn't sure if this would interfere with any of the components on top of the PCB or not. You might find that the heatset insert melts through the side of the screw post if you are not careful…