drakulie: first of all: thanks for sharing and providing insight into the world of a professional stringing. very cool!
since you own a star 4 and 2 baiardos...if you were to string two of the same racquets, one on the star 4 and the other on the baiardo at the same reference tension using the same string, technique and stringing pattern, would the racquets have the same ERT readings? if not, how much difference have you measured? (assuming you've tried this before)