Folks lets step back a few & reassess the original notion behind this thread.
looking for a kit for short duration, belt packed, non-obtrusive blah blah.
This is an interesting conundrum, pack enough yet be unobtrusive, light enough not to be ditched.
NDD mentioned a signal mirror and a Wetsu kit, so a dimensionally this kit has to be no bigger than an altoids tin, no biger than 1 inch more on all directions.
FWIW, my SKP was designed to hold the contents of an RAF Mk.3 Aircrew kit plus some additional kit.
Reaper, I'll look at your list as a baseline to see if it can fit (theoretically) into the EGL SKP.
EGG