Troy:
 
That photo could be entitled "Patience".  Tiny files, teeny-weeny saws made in
half-circles, a set of complex pierced hands, etc. Hours of effort which can be
spoiled at any point by a mistake. Are the half circle saws shop-made? If not,
who makes them? Why is the half-circle a good shape? Does it facilitate angled
cuts? John Ruth
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