Rant: I thought my detail callouts were fine until a review in Denver

I was showing a set of shop drawings to a senior drafter named Carl at a project meeting in Denver. He pointed at a single detail and said, 'That missing tolerance note is going to cost the fabricator a day.' I used to think those small notes didn't matter, but now I check every single one. Anyone else get called out on something small that actually mattered a lot?