To protect the fragile LimeSDR mini PCB I placed the SDR inside an aluminium case.
To keep the SDR cool, I've added a SUNON 5VDC fan. The fan is pretty noisy inside the case - I assume the milled fan grill is not ideal. I will go for a lower performance fan from SUNON in the near future.
For optional fan noise reduction, I'me it it switchable via a small toggle switch.
The REFin socket is already connected to the LimeSDR mini but I haven't fired up the soldering torch to resolder a 0Ohm resistor to enable the external clock source.