The lip on the shelf holds the sawhorse rigid. To break down the sawhorse, simply lift the shelf.

#656 Shopmade Multi-Joint Jig - Joinery Tips, Jigs and Techniques

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The easiest cross cutting sled you can make that still achieves accurate cuts.

Simple Center Finder

Box Joint Techniques - Joinery Tips, Jigs and Techniques | WoodArchivist.com

General purpose crosscut sled (and an announcement)

General purpose crosscut sled (and an announcement)

Box Joint Jig Handles Drawer Joinery with Ease

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