[fortun8son]

Experience counts, but what if they've been doing it wrong for 15 years?
The USRSA tests for a minimum standard of knowledge and competence.

I've not gone to take the test and I may not, but I know I could pass.
Does this make me a top- notch stringer?
Not at all, but at least I know not to string all of the short side first, pull two strings at once, and tie off with a single half hitch.
Many stringers get faulty instruction and practice their lousy technique for years.

I've seen many a horrible stringjob and weights placed willy-nilly on the frame.
Some of them by teaching pros who know just enough racquet tech to be dangerous.