I like the idea of reversing the usual strategy. The smaller bag has the wheels and it carries a non-wheeled 22x14x9. No wheels on the larger bag helps keep the weight down for those LC airlines that have 25 or 40 pound limits. Nobody ever weighs the smaller bag. Lipault actually had or has a version of this but because the large bag rides sideways on a 2 wheeled tote, it is too wide to wheel down a plane aisle. It would work better as a spinner. A problem with 2 wheeled bags being stacked using a sleeve is they are much heavier to pull than when an add a bag strap lowers the center of gravity.