I was using a wooden tip for quite a while. I liked it a lot, but even though it was a 510 sized tip, it didn't fit too snug in either of the clearo's I use. I have found it just as many times as I've lost it, but the last time, in my driveway, a car's tire found it before I did. I really can't see spending another 4 bucks and change on a tip (I don't even remember where I got it either, I could look at all my invoices though..), so I'm using the delrin plastic tip that I have. I often use that tip on either of the clearo's I'm using at the time, but sometimes one of the clearo's has the del tip, and the other has the stainless one that came with it. I certainly don't like that tip that much. It tokes OK, so it's just another cross I bear.