I wrap the skeleton handle of my neck knife with cord in much the same way. I agree you can never have too much cord, and it makes the knife more comfortable to use.

You might consider a plastic magnifying lens/card as an alternative or in addition to the mirror. It, too, will flash brightly in the sun, and has the added advantage of being yet enother way to make fire (sun cooperating).

I carry 30' of floss in the little blue plastic container the dentist hands it out in, which I found has a snap-open top and can fit three fishooks, two swivels and two split shot sinkers for an instant fishing kit.

Consider putting together an Altoids or Sucrets tin EMK to go in another pocket.