Well, have had my prestige euph now for about a month, and have some slight issues with it that haven't been ironed out yet with the initial breaking in. Firstly, the fourth valve squeaks quite loudly, and I can't find the source of the noise. My teacher-who has had his prestige a long long time, and knows the instrument intimately, suggested taking out the bottom rubber washer, but tihs dosen't seem to have done the trick, and i have also tried wiping the excess water off the valve, as i know this causes problems on the prestige valves... Secondly, any note above and beyond A-above-the-stave (excluding Top C) seems bizzarely difficult to hit and sustain, again, I have been over this with my teacher, and he is helping me with that, but I was wondering if there ae others that have experienced this problem. Before this instrument, I had an old round stamped (I think) Sovereign for about 5 years. This instrument I have now is a brand new 2052, which is the large bell version. Maybe I am jumping the gun, and I haven't left enough ime to break the new instrument in, if that is the case, do any others have experience with this instrument and breaking it in, how long did you feel it took for your instrument to reach optimum performance?! Alot to take in lol I know, but if anyone at all has any input, would welcome the advice!!!