There was a builder contacted me from Florida USA about a year ago to talk about his 520 that he had started. But he got caught up in the cyclone and his build was delayed, and since then I never heard from him, I havent seen any other 520 builders publishing anything. Bernd has? some great designs in this smaller range . You cant go wrong with choices like these, the 480,? 520,? 5.5,? 6, and not to mention Cataproa (now 2 sizes). I have been lucky enough now to have followed the build, and most cases sailed on? here in New Zealand of: Duo480 (mine),? the5.5,? the 6, and the KD650. All great boats?
As Bernd says: "pick one and build it"
cheers
bryanandmarycox