The string tension is a recommendation by the manufacturer for warranty purposes, however I have strung that exact same racket to 26lbs in the past for a customer with no issues. As long as the shop has mounted the racket correctly, it should be fine. The Arcsaber 3U racket is pretty durable.
Kindest regards,
-Ajay-
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The best thing to give to your enemy is forgiveness; to an opponent, tolerance; to a friend, your heart; to your child, a good example; to a father, deference; to your mother, conduct that will make her proud of you; to yourself, respect; to all men, charity.
