I bought, and am very happy with, two pre-built nodes, one each for VHf and UHF, and they appear to be specifically for the Pi 3. I own a Pi 4. While both units work perfectly, did I buy the wrong ones, or is it only the configuration and location of the USB ports that differentiate the two units, if indeed there actually *are* two units--one for the 3 and one for the 4?
