I was in a tennis specialty shop in my town yesterday, and the owner was the only one working. He was in the back stringing while I was browsing around the shop. He was just starting the crosses on a racquet when another customer came in needing help with selecting a racquet. So what is a shop owner to do? Ignore the customer? Or leave the racquet half done and help the customer? Well... He left the racquet and was with the customer for at least 20 minutes - until I left the store. Who knows how long that poor racquet was sitting there with tension only on the mains? Then later in the day, my son and I were checking out a tennis club to join. We walked in and saw one of the pros stringing a racquet. He politely offered to take us on a tour of the club and didn't think twice about leaving the partially strung racquet on the machine. I appeciated the tour but felt bad for the customer whose racquet was left on the machine. I tried not to ask many questions and end the tour quickly, so he could get back to stringing. To me, these two situations are poor examples of "professional" racquet stringing. I understand that in both situations, the guys needed to tend to customers on the spot, but it still seems like bad stringing practices. Am I making too big of deal about this? Can frames be damaged if left for 15 - 20 minutes? Thanks.