I bought a large bag of Extra Heavy 351 celluloid picks about 3 years ago, and I was coming close to the end of the bag, so I ordered a refill bag. The new picks look and feel and sound different. The new ones have a shiny gloss finish, and are a little harder to hold. Sonically they seem a bit louder and have, for lack of a better term, a little less harmonic content. It's subtle, but enough for me to notice, while a-b'ing new vs old. I wonder if the duller finish on the old ones creates more friction, or drag against the strings, and as a result, a little more harmonic information? Anyway, Fender, why mess with a classic? Anyone know where to score some NOS 351's?