RNR, you have to understand that when you ask a question about drilling there are a great many who post who don't know squat about drilling. Those folks (thankfully) usually don't respond. Of the few who are drilling guru's several are very intermittent (or virtually absent posters - King of the mill comes to mind). So if you don't get a response to your drilling question, be patient. You might even PM someone who does know drilling (JohnP, T-God, KOTM, Constantine for example. They may not agree exactly, but you'll get good advice). Also, when you ask for drilling info for a specific ball some of the drilling guru's won't respond since they may not be familiar with the ball.
For example, you probably don't want drilling advice from me - I know just enough to be dangerous.
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"A little sincerity is a dangerous thing, and a great deal of it is absolutely fatal." Oscar Wilde
Ragnar sure likes to throw his purdy Uranium Buzzsaw.