The weisenheimer replies amuse me, and you're all exactly right that clients should hire professionals to do this stuff.  But, trying to force clients to serve my wishes doesn't seem to be too practical all the time.

I charge by the hour, so I made more money trying to fix their crap than I would have if the first eyedropper click resulted in a perfect key.  They were trying to save money by hiring some local kid at a distant location, and didn't want to pay to fly an experienced shooter.  I'm sure my extra time cost them less than air fare.  But, I'm trying to do them a favor and give them some tips to improve the outcome for the next time.

Thanks, everybody.