Getting from the "invention living in your brain", for an actual functioning product is called "reducing the invention to practice", and almost invariably results in the discovery of the variety of issues with details which are not clearly evident when only surviving in your brain. Producing a model or prototype http://franciscobqes03692.thezenweb.com/Invention-Prototypes-and-Models-Valuable-Tools-For-that-Small-Inventor--32055510