Nick, thanks for the reply; now , just a bit more;did you experiment with different FIF rotation directions; ever have any `LTE` excursions; how many blades did it have; did you have a fixed fin, or fin -rudder; was it better at low-speed than conventional t/r etc.? We`ll understand if you have a `senior moment`( can`t remember`)! Also, if one looks at a Gazelle against the S-67, there`s a very close proportionality-you were`nt on holiday in the S of France in the early `70`s were you ?