Good post Tom. I'm getting some good ideas here. I bought one of those Park MTB-3 rescue tools because I thought it looked very handy and would supplant several tools I carry. Come to find out most of the stuff on it doesn't fit anything on my bike. Stoopid me. Destined for the For Sale section.
I am right now building a custom leather saddle bag, so this thread comes in handy in designing the size and shape of it.