All of the tank bags I've seen so far, Givi, Eclipse, etc. have one big compartment. The bag on my BMW K1200RS has two layers/compartments. I put the stuff used regularly (paperwork, EZPass, glasses, ear plug carrier, etc., etc.) up top, and things like bungie cords, air pump, Dynaplug kit, etc. in the basement.
The reason why I don't just move to my '17 is the bag is specifically for the KRS. The front strap tab can go under the two screws for the tank. The problem is the back end has a metal strap designed to be held by screws holding the gas tank in place. I don't see any obvious place to anchor the back (fabric) strap. Is there something I can use for this purpose?