For what it's worth, those of you (used to be "us") checking/adding air frequently will find that checking becomes easier and adding becomes infrequent with the all-brass Tire-Man or Borg custom stems. I replaced our rubber valves and assorted extenders with Borg. What I was after was ease. I had to try and hold the extender, usually with pliers, then apply the air chuck and operate its handle. That's one hand more than the Lord gave me.
With the metal stems and easy access, checking is a couple minutes to do all six, and actually adding air is more like Twice a YEAR!
I added Air-Through Caps, so like Harvey, no cap twiddling needed. Those caps come with the Tire-Man kits but I got some separately from a tire shop for mine.
Work-Arounds are fun to do and talk about, but custom brass really is Da-Bomb!