Some time ago I bought a Griffin standard bobbin and finally got around to using it only to find out that it cut the thread instantly. Bought it at Pacific Fly Fishers but the receipt is long gone. Called Griffin and explained the situation to a very polite woman. She told me to send it back and she would get a new one sent out asap. I asked if I should upgrade to a ceramic bobbin and she told me that she would replace my standard bobbin and throw in a ceramic bobbin free of charge and I could try them both. I appreciate that customer service! Kudos!