This is the result of a couple of weeks with the caliper. Tell me if you want me to add some features or change something.
Please upload some photos and do an "I made one" of this if you print it =)
General tolerance is 0.2 mm, this can be too tight for some materials/printers. If that's the case try lowering "extrusion multiplier" in your slicer or use the files with "tol0-5" at the end.
If you like my designs and own a Raspberry Pi Zero check out my model for the zero here.
Now also compatible with model B+
You will need to use the files prefixed "rpi3b+".