I've been looking into carbon fiber endpins lately and I'm wondering what's out there. My teacher just got one on his orchestra bass and it made a noticeable difference in volume and clarity. He got his from Robertsons in Albequerque who gets them from a guys who makes them locally (not sure of his name). It's quite a bit larger in diameter than the standard Goetz pins like I have now, and it feels really stable... So, aside form this one from Robertsons, the 8mm replacement pin from Upton bass, and the one made by the company that's making arco and pizz pens (sorry, wasn't sure of the name) Does anybody know of any other carbon fiber endpins?