Piano-hinged box

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A plywood box, with integral piano hinge and latch. 3mm birch ply, 1.8mm piano wire

Thanks to Martin Raynsford for the hinge design, which uses etched grooves in a pair of layers to hold a wire. I imagine printer filament would also work well for this.

The .dxf is here if you're interested.

This is a sample hinge before glueup so you can see how it goes together.