@Black-Square Wait, I mean I knew that turbines are significantly lighter than reciprocating engines, but I hadn't ever thought much of the fact that the empty weight on the piston Dukes is lower, and by a few hundred pounds that can't all come from the second battery. Where could all that extra weight come from? I thought other than the engines, second battery and the requisite differences to the HVAC, pressurization systems and panel they were largely identical?