Enjoyed the stage sound discussion..... as someone who has spent time looking at sound boards but never managed one. Well, there was that time when I shut down the echo on one channel when my daughters choir was between numbers. I think I have a better ear for a mix than some of the houses I've been in. One High School vocal concert had monitors going but little house sound. The 'engineer' was reading a book and defensive. Improved a while later. That should be a lot easier than mixing a band.
A high school friend plays some gigs near Seattle, where he lives now. Perhaps he is the guy with the too loud amp, or maybe someone who wants to play with a new bass player.... In high school he could recreate just about any guitar solo, playing behind his back! I don't know much about what he is up to except what I see on FaceBook:

A place called Big Daddys is in some of his pictures. Recognize him?