TW, I have a ton of string that I've bought in the last year. I go through phases where I think I like a string setup and go and stock up on string. I'm left with a bunch of retail sets that I know I'll never use again. Can I send them back to TW if I provide my order numbers, the retail sets are unopened, and if they were purchased fairly recently and all returned items are still being sold by TW? Thanks.