I don't live close to a mountain, so I need to commute(2 hours)...and when I get there, my buddies just want to ride. Not wait around for me to make adjustments, which I can understand.
Take off yourself for an hour and figure it out. I can't stand riding when something's wrong with my setup. I'll just leave whoever I'm riding with and meet up with them in a few runs...
If you're riding with a stance that used to be comfortable to you, but isn't anymore, I'd have to say it's maybe you and not the stance! If you don't get out much it could just be that your legs aren't in mid-season shape yet.