yup, all valves were supposed to be verified, including argon bottle...
Damned heretic, I was robbed!
Actually I don't recall really doing any valve drills with el Heretic. We did those on our own "warmup" dives. Then got launched into the blue glove scenario dives. So there was sorta a disconnnect between valve drills and actual failures. And I don't remember flow checking (or not) argon bottles in scenario failures, I was a bit overwhelmed at the time.
Argon valves/hardware kinda have their own unique failures anyway (independent from the manifold) so I'm not too concerned about getting them mixed up with anything honestly. #1 failure for me has been the orings in the inflator itself. Had those poop out several times. I actually bought extras last time and they came in handy for a SoCal guest up here a couple weeks ago.
Limeyx were you flow checking argon valves in your class last year?