Glad to see this thread is still relevant and generating discussion

Interesting idea on the sling style, might have to try something like that soon

for now, I'm still toting the beaded dog tag style neckchain around, with whistle, fenix e01, firesteel and pill fob attached. For edc it rides in my pocket, for outdoor adventures I untangle it and wear around my neck between base layer and outer layer. I've also experimented by adding key chains that snap apart to the fire steel and the whistle for easier removal when they need to be used (in hindsight I probably should have used one for the fenix rather than the whistle, but i think I have a few more lying around).

I have come to the conclusion that, at least for me, this is not a stand alone kit but rather an addition/supplement to other survival gear in my pack and/or pockets.