I've found that 4 out of 5 times I go flying, I don't need more than just the basics out on the flightline...so my flight box is bare essentials. Sure makes lif easy when nothing goes wrong. However, if something does go wrong, a tool box awaits in the car fully equipped with quick charger, tools, hardware, etc etc...etc...etc...I just don't have to lug it around if not needed.