Good.
Revamp the Charlies, if you must, but B-TacMods were hauling the mail before gall-blame computerized Charlies showed up, and the Charlies have been doing an adequate job since.
Lower take-off weight? So what? They carried enough fuel and bouys to stay up until the crew became zombies.
Dumb idea, anyway, a twin-engined jet loitering around at 1,500 feet...