I completely agree, successful inbreeding is all about rigorous selection, and starting with the best possible genetic material. I always remember the story of Cleopatra when it comes to inbreeding. In genetics you can't breed out unwanted traits you can only suppress them(make them recessive) , sooner or later if you don't select properly they will come out .Cleopatra was supposedly the most beautiful woman in the world, she was a product of incest, her brother was the complete opposite he was born with physical deformities. Great read .