I had the pleasure of flying with Denis Ferranti in 1976 at his chateau in the south of France. An amazing man, 68 years old, only 1 eye, his right, lost the left one in the Isle of ManTT in 1929 I think & so the Irish CAA insisted he had a commercial pilot in the left seat of his 206 or 500 to keep an eye on the T & P gauges!! His charming wife also had a PPL.