iab, thanks for your feedback. Your first proposal is interesting option. What is tricky though here, is that as they need though “just” a prototype as a proof of concept to demonstrate basic principles and then the international company will, most likely, customize the design, they will not really need me for a “next step”. Furthermore, as they will be selling technology and their business model is just that (not to become a consumer electronics company), i do not see any future with them. Your second proposal sounds reasonable. thnx