RAX80 behind RAX200

Your thread came up for me 6+ years later with my own dealing with the RAX80. I am using it in the way you indicated here, but not in adjacent rooms. I have my RAX80 in a detached garage patched into my network via MOCA / coax arrangement. It works well. To get my setup I followed some stuff I found on topic online, probably like you. But what I wanted to mention here was use of Android phone apps to evaluate connection and signal strength. So I was using a little app called 'WiFiAnalyzer' and another called 'iPerf' and these would permit me to walk around my place looking at radio (SSID) strength for picking my channels (1st app) and then check gain / loss of signal on roaming basis (2nd app) once I had trial AP settings. Use of this required me to go into the Android using so-called 'developer options' and boost the wifi pinging rate (a battery drain) while I did all this. So a fair amount of hoops involved, but satisfying in the end, compared to buying the next overpriced thing from BestBuy. Here's my question for you -> now that the RAX80 is at end of service (patches, etc.) and it's not accessible to opensource projects like WRT due to the Broadcom chip, how do you plan to continue using these planned obsolescence devices? Are they working for you NOW as originally planned in 2020? If so, I would keep using them until they die. But I'm curious your plan. Cheers!