Of course there's no organized development plan required to build a prototype experimental. To get it registered to fly it has to be looked at still, but even so it doesn't seem like it would be certified by the govt in any eventuality. And, why would anyone in their right mind develop an entire design soup to nuts, before starting on the build? Then there'd be nothing to fix! And have the design looked at by a third party? They might send you back to square one after all that work! Better to get it 90% complete first.And why is there SO much stuff to fix so late into the build of the aircraft ? Did he not get the whole model reviewed before entering the production of the prototype ? Is there no organization you have to go through in America to get your plane approved ?