I've talked with "Cherry" about many things the past few days. She's never been of any assistance. Maybe I should give up Press the button "Buy". "Cherry Customer support Sky How can you determine what model Inspire 1 you are buying? I am aware of models A,B,C,and is there a D? Chat started Please wait while our agents attend to you. There are currently 1 visitor(s) waiting to be served. Cherry joined the chat Cherry hi welcome to DJI I am sorry but there is no models are here Sky Production model. Each time the prop connections changed the model was changed. The original i1 had threaded props, the newer ones dont. Cherry I am sorry,but I do not heard it before"