Just a proof of concept. Is there a way to integrate a hook into a 111mm knife? Yes there is. Even without to sacrify the cork screw / phillips.
Mine shows a saw layer with backspring from a 08 Soldier Saw. I added an additional nail nick to the hook, since the real nick will dissapear between the liners if the hook fully closes.
That layer with a hook will be put right into my Hunter OE.