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				| Time to cut out the center hole in the inboard rib
 I used the T-407 ring as a pattern to draw a circle on the rib with a red sharpie. The instructions say to use a fly cutter for this large hole. My fly cutter needs a new blade, so I decided to use my Unibit in my drill press to start the holes around the outer edge of the hole.
 
 
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