Very interesting, Yog. Thanks for sharing your efforts.
My lack of mechanical ability knows no bounds, so it isn't surprising to me that I'm puzzled by a couple things.
In the second picture, where the blade is partially open, the lockbar/spacer, whatever it is, is pushed out from the line of the scales/liners, just like a slip joint. Is this part of the deal with the compression locks?
Also, you said the spring isn't present in the 3rd picture. What form of spring is it, and where does it fit in the scheme of things, up near the pivot on the back? Would appreciate understanding this. THanks,