Hammer Boring

Matthew Todd toddpianoworks at att.net
Sat Aug 9 16:15:19 MDT 2008


I have become known as the man with many questions, so here is my next question.
   
  Why are grand hammerheads bored all the way through, but not verticals.  I do not know if every grand is, or every vertical is not, but I was just curious.
   
   
  Matthew
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