I made my own wing attach fittings. Having a drill index with 1/64th
spacing, drill the holes 3 or 4 sizes smaller than the finished hole.
Then , by 64ths of an inch, drill out the hole to the finished size.
This will get you to the best rounded hole you can get without a
reamer. John Shaffer N455JS Fremont ,Ohio.
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I'm guessing that would not be a job for a "Sears" drill bit.
Sometimes
us "high school physics engineers" survive in spite of ourselves.
Larry Flesner
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