The best reverser I used in the old days was Andy Low's at electrodynamics, immune to temperature differences, it is all digital, only thing I saw was that it was an 8 bit system (255 positions) and most PCM radios are 10 bit (1024 positions)...big whup I don't need 4 times the precision to fly bad.

Otherwise those reversers are bulletproof, no temp problems whatsover.

Those Expert things are analog I believe, temperture adjustment is why they have that centering pot to begin with, no? :-) They belong in the round storage bin, with some other stuff ;-)