Hi @Vanthome, thanks for the information. That external mPCIe enclosure is a better solution and I can buy it on Amazon for a lower price than via Aliexpress! It also means that I should be able to use an RPi zero and connect/power everything via a small industrial USB hub with 7-24V which also solves the “up the tower” power challenge.
I note that the n-fuse website is listing it as available in Q3 2018. If there’s any early availability then I’m happy to test and write up a full howto to go on github or the TTN forum/website.