Could you create an endcap that fits the NiceNano clones?

[jadenguy]

They're much cheaper than the Xiao BLE these days.

[jadenguy]

I'm going to give modeling one in FreeCAD a shot and will put in a PR, but it looks like your project is in Fusion360 and I'm sure you'd prefer to have that format if you are iterating on this.

Here's the board I'm referring to:
https://github.com/joric/nrfmicro/wiki/Alternatives#supermini-nrf52840