Speedbird. You seem to have an unfortunate habit of making personal attacks on readers who post discussion points on Pprune. It is this bad attitude that quickly puts the shutters up on those of us who enjoy an intelligent technical discourse. By all means add your bit to any subject on Pprune which takes your fancy - but do try to maintain a modicum of plain old fashioned good manners at the same time. Your rather childish petulant attacks on Flightdeck are lowering the usually high standard of debate on Tech Log. Now be a good boy and go and take another tablet....