@monte Good question! I'm completely new to security hardening, and so I just assumed that the guy who posted the GPS NPT suggestion was aware of some threat. But if you aren't aware of one, then maybe there's no reason for it.
@Westie That feature can also be used with the Arduino Nano, or any other ATmega328P-based board.
I had NRF24 + RFM69 running for a couple of days using a Nano as an Ethernet MQTT gateway and it worked fine as far as I remember.
@Julie-Adam Have you considered disconnecting the air-line from the controller and reconnecting it to the air-head ?
The cranium woodframe is probably interrupting signals which possibly
explains the coupon fascination...