Getting in the "invention residing in your brain", for an actual functioning product is called "reducing the invention to practice", and almost invariably results in the invention of a variety of problems with details that aren't clearly evident when only living in your mind. Making a model or prototype will http://franciscobqes03692.thezenweb.com/Invention-Prototypes-and-Models-Valuable-Tools-For-that-Small-Inventor--32055510