Squaring a Mitered Corner

For some projects, like the mitered box shown below, a band clamp is the easiest way to hold the project together while the glue dries. But there is one small problem. The mitered corners tend to slip out of alignment as the clamp is tightened. So in addition to the band clamp, I clamp short pieces of aluminum angle bracket to the inside of each corner to draw the miter together. As you can see in the detail, filing a slight roundover on the outside corner of the bracket provides room for glue squeeze-out.

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