I discovered something quite interesting recently. What you do in the practice room is not necessarily what will happen in the concert hall; especially under high pressured occasions. For a while i have not understood what is going wrong, but it finally clicked when i watched that Vizutti Masterclass posted here recently. I was thinking about my lip, and technique too much,but most importantly of all i noticed that pressure was causing an inordinate amount of nervous ticks i.e cleaning the mouthpiece, shuffling valves, BLOWING WATER during every rest! I've made a concerted a effort to stop and it has decreased tension significantly. Have any of you lot had similar experiences? B.U.M.