I myself go with the fistmele approach.
I just don't think you can treat a selfbow same as a fiberglass bow. For one, a selfbow is rather dynamic. Changes wieght over time, over weather, etc.
So sitting there recording numbers in milimeters, I think is a waste of time. I adjust it to get good feather clearance, and without hittin my arm too much, noice, and go from there.
On glass bows, I think you can put a lot effort into it.