I have a non pen project that I make a lot of, pretty much developed my own process. It requires a wood round with a perfectly centered pivot point. We all know it's usually not a good habit to remove whatever you have in a regular chuck unless it's necessary. That's what I've had to do though. So I bought a lathe spindle tap from Beall's and made a dedicated chuck. Happy to report it works amazingly well. Here's my original and the new spindle mount one.