Don't feel so all alone. A few months back, I found a Luna Pro SBC at a local camera shop in their junk bin. It had a sticker on it that said "4 stops under - $5". Welp, I figured I might be able to adjust it or have it adjusted for less than what the SBC was worth, so I took the chance and paid $5 for it.
Got it home, replaced the battery, and one of the first things I noticed was that the EC ring was turned way the heck away from zero. So, I turned it back. Compared it to my Luna Pro F, and it was dead nuts on the money, or at least it agreed with the F.
I've thought about going back there and letting the folks at the shop know about their error. But why should I wise them up -- or hurt their feelings?
Michael