Victor
If you want to venture on over to the segmented side, we use 3/4 inch thick boards, and cut the angles to the appropriate degree for the number of segments you want to use. We run the boards anywhere from 1 3/4 inch wide, to 4 inches wide depending on the style and "size" of the ball you want for the body.
We rip the boards to width (1 3/4 inch to 4 inches), and then we use a radial arm saw to cut across the board to give us the segments. This allows for continuous grain around the ornament (no end grain). We also use a pen blank size material for the top and bottom finials. If you have a 6 inch blank, you should be able to get both a top and a bottom out of it.
Our style of ornament also has end blocks that we use to seat the finials. They are usually a square of material that is 3/4 inch by lets say 1 1/2 by 1 1/2 inch. As you get more experience you can make the caps smaller.
I will be up at John C Campbell this week, but if you would like more information, I can get back to you next week! Good luck on the ornament project! We want pictures!
Robert