"Bob La Londe" wrote in message
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So... any words of advice on counterbores?

I see basically two types. Fixed pilot and interchangeable pilot.

The obvious advantage to interchangeable pilot is the ability to pilot
different size screw bores with different size head bores. They might
also be easier to sharpen with the pilot removed. Are there any
disadvantages?

Are there any overwhelming advantages to the fixed pilot counterbores?

After some deliberation I decided to pick up a set of each. I considered
also a metric set, but decided for the most part I could use the replaceable
pilot set with custom turned pilots if necessary.