Jim,
You touched on my point - why worry about a 7th-decimal point lack of precision when we make every course longer by a 3rd-decimal point lack of precision?
And, we use Jones counts, not tape measures when we do our courses.
When doing a calibration course, we strive to be absolutely accurate. That can be done with Imperial or metric. If the operator can't read a tape accurately, it that the fault of the methodology? No, it is the fault of the user. To make it crystal clear, if I shoot 95 for a round of golf while using Tiger's clubs, does that mean he needs new clubs, or just that I am incompetent in the use of those clubs? It is the user, not the tool, that determines accuracy in our field.
Have a great Thanksgiving, all.