Moved an Access Point to the vicinity of the garage and all is well. Wifi scan now that I’m connected with it in the proper location shows the “new” AP at “Quality 100/100 Signal Level 98/100”, whereas the original AP shows “Quality 97/100 Signal Level 44/100” Not sure what the metrics are (the man page for iwlist doesn’t say) but I’ll deduce the Quality metric is not particularly useful.