Tire Man is fine, so is
Dually Valve aka BORG.
I found BORG first and have been completely satisfied. Excellent quality, no install issues, and great personal service from Bill FalkenBORG when I (NO fault of the product) ruined an Inner Valve and he rushed me a no-charge replacement.
Just get SOMETHING that:
1. Is Solid Metal
2. Extends to where you can use ANY Air Gauge, ANY Air Chuck
3. Only involves ONE joint, ONE Valve Core
Both products referenced here accomplish all three. You'll go from a miserable tire checking job every few weeks to an easy job every several months. I couldn't believe how much air gets lost with rubber valves, screw-on extenders, etc.
Some kits come with Air-Through Caps. I got six and found the two on the front make ordinary metal stems accessible with our wheel simulators. So I can check all tires with any gauge/chuck and it takes only minutes. I add air only a couple times a year.
If you can outfit your wheels less expensively than BORG or TM, Fine. More Power to You. Just get SOMETHING that does 1-2-3 above, no compromise. Life it too short for tire issues that are SO easily avoided.