Alf. Thanks for the offer of manufacturer management pilot contact. I will certainly keep it in mind.
I retain regular email contact with a senior 737 simulator instructor at Seattle and we have thoroughly interesting discussions on such thing as speed additives. He has asked around the Boeing camp on the subject above - and he was quite unable to pin any of his colleagues down on the specifics of wind additives - IAS bleed back and so on. At this stage I think I am flogging a dead horse and boring people to death, unfortunately.