Strings break at top of Prince O3 Speedport Black
I've noticed that after stringing these racquets, the strings have a tendency to fray and break near the top of the frame because there is no protection from scraping the frame against the court, etc (which scraps the strings too).
What is the best protection against this? Besides, using headguard tape, is there a preferred method. Do the string inserts that they sell protect against this? Using plastic tubing?