When I think of turning a Burl cap, I think of two different ways. The one in my other enter (winged) or the one in this entry (even walled). They both are completely different, and how the Burl is sharped is how I decide what one to do. In this one, the Burl was really oddly shaped, so I did thin walled. That way you can see the shape of the burl and it gives it a "woah! That was turned on a lathe?" effect.