The curved aircrew knife always seemed too blunt to be of much use although I believe one 43 Sqn bod did use his to cut away his chute rigging lines after a night time mid air found him and his oppo in the North sea. Unfortunately he reportedly also severed his PSP lanyard and lost all his survival aids.
Equipment storage was always an issue on a fj Sqn. I was often called on to make up patches for circuit breaker tools, pens and torches.
Nav bags made from two lower immersion suit pockets seen back to back, with or without a pen patch stitched on one side were another favourite.