I don't have an "urban" kit. I have some stuff in my car that might well be useful for such a kit, but I never got around to actually making one.
The thing is that in urban areas you have access to a lot of resources at hand that just don't exist out in the woods, so I guess I feel the need to have some things in the woods that I don't see as especially necessary anywhere else.
I don't go to urban areas much anyway. I live 60 miles from Chicago, and I avoid it like the plague. The nearest "big" city is Rockford and it is not that big. I tool around the area a fair amount but many places I go I just would not be comfortable carting around a big pack of stuff. In fact, many of the places I go would take a dim view of me bringing it in with me. Some places won't even let me bring my cell phone, apparently fearing some kind of industrial espionage, although at least one of these places has now relented somewhat and allows outside service people to bring cell phones as they often need to call for technical help, and I come under that umbrella.
Incidentally, I find the typical writing mistakes I see in others' posts jump right off the screen at me, but my own not so much. I wonder if that is because I know what I wrote even if that is not what I actually typed.
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Warning - I am not an expert on anything having to do with this forum, but that won't stop me from saying what I think.
Bob