I recently bought the >> Veritas Shelf Hole Drilling Jig << and I got the extra long bars for doing extra wide shelves as well. The extra long bars did not fit into the cardboard box that the regular jig comes in, so I figured I'd build a simple box to keep it all in place. I know that if I don't keep all the bits and pieces together in one place, I'll end up misplacing some part and then spend too much time looking for it
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Here is the result, nothing fancy, but it holds everything in place so I can find it when I need it!