Touring dad's workshop

From a channel Lumen includes in full: Matthias Wandel, a former Blackberry engineer, builds woodworking machines and jigs and runs measured tests (joint strength, glue prep, tool comparisons), explaining the engineering behind each.

A 7-minute video from MatthiasWandel's catalogue; the title names its topic.

Video by MatthiasWandel, played through YouTube's embedded player.