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look at these

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mullet:
  Yea like Jamie said.It looks like you are working all your edges straight down.Try grinding on a 45 dg angle and push in towards the center of the stone at a less steep angle.Think about pushing and at the last instant angling down.You are really bending the rock till it brakes.It will travel all the way across if there are no ridges or steps.I'll see if I can get some pictures up this weekend.I'm having trouble with the Vista program  I loaded on my laptop:-\

gene roberts:
i thanks,next time i knapp i'll do that

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