^Agreed, and this is why I think it might be worth it for the OP to take it up with Sugino. I'm not going to get into the debate of whether new track cranks are "worth" the investment, but I'm sure if I spent something north of $200, I'd expect it to last or for the company to stand behind the product if it didn't. All the nay-sayers aside, it sounds like the OP did everything right in this situation and the cranks failed. For any product, a small failure rate is inevitable, and it's how the company responds that counts. At that price, I'd say it's worth the price of a phone call or a letter; if you have pics of the fully stripped threads, Sugino might be compelled to help out. It boggles my mind that so many folks are quick to jump on the OP and insist it was user error -- I'm guessing in the interest of good customer service that Sugino will at least listen with a more open mind than that.