Honestly that 80% from 5 people thing sounds like something a guru made up to sell a course. Plenty of folks build a solid book where referrals come from 10 or 15 different people, and it works just fine. Two solid referral sources is nothing to panic about, esp if they actually send you good leads. The number matters way less than whether those people keep sending you business.

That "what does the nameplate say" line hits home, had a guy swear his AC needed a 50 when the tag clearly said 35. Saved him from cooking the compressor on a hot July day.

Walt at the Denver museum sounds like the kind of guy who makes you stop and think. I've noticed this pattern with all kinds of old things, like the cave paintings in France that only survived because a rock slide sealed the entrance for thousands of years. Or those bog bodies in Ireland that stayed intact just because the water was cold and had no oxygen. It seems like most of what we know about ancient people comes down to pure luck with the dirt and weather. We only get the stuff that happened to get buried or dried at the exact right moment. The rest just faded away and nobody will ever know it was there.