"Cannot find Cab1 that works or is guaranteed to work"
Meanwhile I switched back to the CAB1 since I have 2.5 of those (one is flaky) and only one CAB1L.
I would take gunrunnerjon's advice: if you are buying PowerMasters, buy the Legacy ones for several reasons. With the Cab1 and original gray base, I can control the blue Legacy PowerMasters; they listen to the track signal. The original PowerMasters listen to the ~26MHz of the original Cab1s, as does the original Command Base.
Not a Luddite, I will buy the Base 3 when its more like the Base 3b after all of you get the bugs out of it. I won't even buy a first model year Toyota, and I have my heart set on the new Land Cruiser.