I knew drilling the holes for the screws was going to be a drill press operation. I was not confident that I could get the precision I wanted from a hand drill.
I placed the tricorder into a vice, so that it would be held steady inside the drill press.
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I then took the vice over to the drill press, and very carefully drilled out all 12 holes. I tried to center the holes as best as I could inside the hinges. There's always some bit wander as you start to drill, but I find it can be minimized if you chuck the drill bit deep into the press. That way, there's only a tiny bit of the drill bit sticking out. Less wobble.
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Here's how it looked when all was said and done. A couple of the holes weren't perfectly centered, so I took my dremel with a grinding bit to the holes and expanded them a bit. Just enough to make it so that the tapered head of the screw wasn't likely to push the hinge out of alignment.
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A few minutes later, and all the screws are in place.
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So far so good. The tricorder still opens and closes smoothly, and all is looking good.
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