stone cutter for rounds

 From:  pat (SMITTY)
708.1 
here's a booleon stone cutter for rounds (just scale as needed)
to use
1. copy as many as needed
2. place where you need
3. booleon dif the cutter from the model
4. a nice seat will be cut and a stone will be left in place
you can extrude the bottom of the cutter longer if a deeper hole is needed
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