You could always do the method that the X games ( X3: Terran Conflict, for instance) have done: if it's out of the sector, do a basic calculation of how each unit will fair against opposition and have the loser's health whittle away. Out of sector, in this case, being a set distance off screen. :D I...

Placing a larger capacity box, filling it up with items, then replacing it with a smaller capacity box leads to items being sent to personal inventory, and if that's full, will be dumped on the ground. To replicate: Pretty straightforward. Place an iron, steel, or logistics box, fill it up, and then...