FuelFlow,
Was thought more or less the similar loong tome ago. But in the real world, it is not often that we have the time to aim for the "perfect MAC" if we want to protect turn-around times and load all the freight. So the general rule seems to be (for a computer generated l/s) "If it prints, it flies". But then again, we're only dealing with medium- or shorthaul routes and so cannot save many a penny by a tailheavy load.
However, I'm a bit concerned if your system moves the CG forward as you but weight in the rear of the a/c.