To my knowledge, home built aircraft consist primarily of small, low cost designs. But have any of the following features ever been realized in the home built field? 1. Seating exceeding two passengers 2. Pressurized cabins 3. Fly by wire 4. Multiple power plants 5. Weight (up to several thousand lbs.) 6. Variable pitch propellers 7. Fanjet engines 8. Retractable gear 9. Digital avionics Essentially, how sophisticated can a home built become?