re; wheel studs
It took me awhile to run him down, but I finally found him. For that I apologize. HE said that we used a titanium nitride bit. he said it was very sharp, and he said we drowned it in oil. run the bit at 175 RPM. Anyhow, thats how he said we did it. I think we did the whole thing, all 10 holes in less than an hour including setting up the mill. We used the mill to tap the holes also.