The detail that got me is that the whole blade profile came out of a bench vise, a hacksaw and hand files. No grinder, no powered anything. The maker explains that power tools simply were not accessible, and that noise could disturb neighbors in a high-rise flat. Allan Yeo still ended up with a working edge and a fitted sheath after two days, which seems quick to me by any measure.
The construction reads like a proper little build. A bar labeled XH0820 1095 high carbon steel, sized 1/8 by 2 by 18 inches, got an outline marked on before cutting. The bevel was shaped with a guided filing jig, and the blade was heated to cherry red with a gas torch before an oil quench. From there the edge went onto a water whetstone and was tested on paper before any sheath work started.
The handle side is where the character shows: a wooden cylindrical handle sawed from a piece of wood and drilled, with brass and copper plates cut, drilled and filed into ferrule spacers, all glued with two-part epoxy, clamped to cure, then shaped with rasps and sandpaper strips and oiled. The sheath was dyed with Fiebing's Professional Oil Dye, punched and hand-stitched on three edges with dark brown thread, and the leather for it was cut and skived with the new blade itself.
The maker calls the finished knife somewhat sloppy and pretty mediocre, and the blade was left untempered because hardness was the goal. To my mind that untempered state is the open question here: how such a hard edge holds up over time is the one thing I would want to know more about.
Project by Allan Yeo. Watch it on their YouTube channel: