In the 1997 revision of the Caravan I POH that I based my work on, I have the standard empty weight of Cargomasters S/N 208B0179-208B0381 and associated STC's at 4,040 lbs, including the cargopod. Of course, all aircraft have different equipment installed from the factory, and have many modifications over the years that impact empty weight, but perhaps this came from a confusion over the inclusion of the cargopod, which weighs around 150 lbs. Would you like me to adopt this new 4,040 lbs number? I will promise not to refer anyone who complains about the loss of 115 lbs useful load to you