The chamber flags are the biggie as they're required but more than once I've seen people with guests milling about and whispering. It doesn't take much to figure out they don't have enough to go around. I'd sooner provide them than take a chance with safety or with a potential member being told it's OK so long as no one else is around.
I've been given more help over the years than I've repaid and for that I owe. Same here for good advice, I just wish I had more to offer and sometimes wonder if certain members were born with a rifle in one hand and an engineering degree in the other. Were I not so opinionated I would read much more and post much less.
Forgot to add on that Brockman brake that closing it returned the rifle's report back to a saner level and that the chronograph (we tried 2) didn't care if it was opened or closed, the ammo matched factory specs both ways (no loss of velocity).