Barrel for DIY Pencil Kit

I found a build your own mechanical kit in my Dad's wood shop over the weekend and decided I'd try my hand at mechanical pencil design with some ABS rather than wood.

The barrel is designed to be used with the "Executive Pencil Kit" from Penn State Industries.
http://www.pennstateind.com/store/PKEXEC-PCL.htm

I tried to make a geometic pattern that would be difficult (at least for me) to duplicate using traditional wood working methods.

They sell quite a few customizable wood working