Well I took a step towards drilling my own balls by getting a Pro-Sect. Sure is expensive for what you get. Also ordered a grease pencil with it. Came yesterday, so I rush to my work area with one of my undrilled balls, some layout diagrams, and a hot cup of coffee. There weren't any instructions with the grease pencil so I couldn't figure out how to get it to write on the surface of the ball. Really, what's the trick to getting the pencil to write when trying to scribe an arc? Straight lines weren't too bad but the grease pencil only left a mark you could see if you looked at it just right in the light. And yes I was turning the Pro-Sect away from the arc I was trying to make. Even broke the pencil in half to expose fresh core, still didn't work. Worked better on my scotchbrited Apogee but still not great. I going to an office supply place today and see what they have. If anybody has any suggestions I really need them.
Thanks
Dick