So when you are fretting over the weight of the Evil Granny Gas, do you also consider all the dirt, dust, dead bugs, dead birds, live birds, bird guano, bird nests, lost pens, wrenches, coffee mugs, nudie mags, water, etc. that your "large", twin-engine turboprop 19 seat airplane has acquired since it was last weighed? And do you weigh every person, including the pilots, and everything they bring onboard the airplane before departing? Or does your airline use standard weights? So how much does that add to the official numbers?