The detail that surprised me most is how the lock arm gets its final shape. Rather than working the small part loose in hand, the maker pins it to a rectangular fixture block with two pins, then holds the arm against the abrasive belt to grind a specific contact angle on its lug. For a part small enough to need tweezers during assembly, that looks like a steady way to reach the belt with control.
The grinding setup itself stands out too. A belt grinder is fitted with a vertical platen and a precision steel reference block, and a Kant-Twist clamp is used to align and secure the grinder's work rest. The stamped dimensions on the parallel plate and the labeled clamp in the shop suggest someone who keeps track of tooling, which fits the careful tone of the whole project.
The assembly sequence is tidy as well. The coil spring and the machined lock arm go into the milled interior channel of the metal handle scale, then the blade, together with a washer, is placed onto the pivot barrel. The handle assembly also includes an internal cover plate, and the blade has an elongated opening hole. Once together, the maker tests the pivot action by hand, checking how the lock engages and releases.
The motivation behind all this is clear: an earlier liner-lock folder slipped when the blade was pushed with the thumb, and the maker wants a folder they are not afraid to actually use. The knife is shown being opened and closed to test the lockup, and there is a close-up of the ground engagement surface on the removed lock arm. Whether that lockup now holds under a thumb push is the open question I would most want answered.