Sorry Dave, I had not realised that the forum was for current aircrew only. I thought the idea was for engineers and aircrew, past and present, to present their views and opinions so that a balanced debate could take place. I am sure that you are far more intellegent than your post indicates. The last thing we want is for you "current" guys to around the loop again, only to find it still doesn't work. It's called experience.
DV