@Vincent-TP So you are saying I can install the hardware version 3.28 firmware on my hardware version 3.20? Am I wrong or is that confusing?

I have a CPE510 V3.20 in U.S. I am looking for the latest firmware. When I got to the U.S. support site for it: https://www.tp-link.com/us/support/download/cpe510/v3.20/ It has other hardware...