Ah thanks John. Although I have been in regular touch with Bob for some years now I didn't realise that he and Ann were in a band called Chester Waytes. was this the band with Andy and Eric? I did actually know about this but didn't know the band name. You live and learn. I shall e-mail him now and castigate him strongly! If he hasn't been castigated already!
Yes, I am aware of the underblowing dropping the pitch and it works beautifully on my bass and, to some extent, on my tenor(doesn't really work on the soprano and alto)but it's not a technique I use much. Pressure is, of course, all important on windcap instruments but when you get to know your instrument well it gets easier.