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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@halemmerich
I have given the border around the display an additional 0,5mm in x and y direction in my drawing and it fits loosely in the case. I did not try to measure that with a feeler gauge (lost those somewhere) but there seem to be about 0,3mm space all around the display so I would suspect you can be closer around 100% size for your tries. Maybe 101% and 102% to leave a bit of room for glue if you have your current CAD at a perfect fit. Since the turnaround is just about one week (JLCPCB->Germany) and postage is not that bad a second try is not a big problem.
If this fits well and works nicely with Bluetooth and GPS you could think about removing the original watchband holders and modeling them on the case. There are some people having broken those off and having them in steel is probably more rugged.