It does seem odd, though. They went to such great lengths to replicate Agassi's racket (faux-TournaGrip, rubber band, original paint job). I can see not going to the trouble to make a deal with a Twaron supplier, since they don't do that even for the PT57's that are the modern versions of the old Pro Tours – but why change the string holes?
There are two rules to success in life:
1. Never tell anyone everything you know.