Thank you for the compliment. I figured it out with your advice and experimentation. I'm happy with the results I'm getting.
I've made several Gatsby Grande pens, I actually like them better. They use a 3/8" tube, so the material is thicker on the ends. They're also a larger diameter. But they sell regular Gatsbys at my local Rockler, so I'll pick them up there when I'm not mail ordering.