A while back there was a question about a Yamaha that wouldnt play after being reassembled from being cleaned. I, among others assumed the owner of the Yamaha was, for lack of better words, young and dumb. And proceded to tell him to check for the correct valve number in the right hole, and to turn the valve till it clicks in the index spot, I even suggested he have the school band director check it out . Yesterday I took my Yamaha apart to clean it and after doing a great job I lubed and put it all back together and safely in the case. This morning I took it out to practice as usual and WHAT DA.... No sound. After some checking I discovered that the valve will click in two different spots 180 degrees apart! Figuring out which valves were wacky and reoiling got me going with a sigh of relief that no one knew What a goof I am. To that person that I gave advice to while rolling my eyes, I apologize.