Hi TW! First off I must say that your services are quite awesome and I hope that you continue to be in business for many years to come! I just recently purchased a few things from you, including a couple sets of string. I have realized that I really don't want this string anymore and it was a bit of a wasted purchase. I have found a string that does everything great for me already. Is there a problem with sending string back? Of course, the package is not opened or compromised. If this is ok, I will be sending them back along with a used racket that I recently purchased from you guys as well. Thanks!