Maybe I've overlooked something but I don't think anyone has been flamed here. There is a difference between taking a pile of balsa, plastic and hardware and converting it into an airplane compared to taking a limited amount of prefabricated parts and putting them together to make an airplane. Big difference between the two that is basically the difference between build and assemble. But even more is the degree of work associated with the scratch builder as one has mentioned. Scratch building is the ultimate in building and takes the greatest efforts and knowledge based. Next easier is the kit building, with the ARFs, RTFs, etc with the least time consuming and knowledge based to turn operational.