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Re: [ATM] artificial convex curve for pitch lap



Mark Holm <mdholm@telerama.com> wrote:    -snip-
  
Now, one little
problem. If you want to make a sub diameter tool, I don't know how you
easily mold in the curve. If you are going full size, then this is dead
easy, till you get so big you can't lift the thing.
   
  -snip-- 
  
Mark Holm
mdholm@telerama.com

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I just roll a piece of 4 inch flashing (thin aluminum) into the desired diameter, use hot-melt glue to hold it together and place it on the ground mirror surface and put in the plaster. Any that runs under the flashing will harden fairly quickly and will break off easily leaving a fine tool base. The flashing can be "unrolled" for use again later.
   
  Ken Hunter

		
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