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You are right not to attempt to invest the holes but you should
conquer your fear of drilling. This is really the only way to get
the proper hole for your links. If you try to use a wire, even
stainless, it will warp, get firescale and ruin your casting. Just
form a small dimple in your wax where you want to drill before
investing. Setup a firm holding jig to do your drilling.
Bob
3DESIGN
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