I need your email as it's in the form of a pretty big Word Doc and i can't attach to PM's. You can PM your email addy if you want, to keep it off forums.
You can use the Kari-me (same as HAB so similar here too i'd think) until bubs is 15kg, but it stops being comfy about 5kg before that! lol You can put a tired toddler on your back with it, but you really need help to get them on and get everything flat and comfy for you both (i found) but my wrap/mae tia in general, for me, really come into their own when bubs is good at walking but still small enough to get tired out easily.
Bookmarks