Another reason for the stuffy sound and odd chromatics may be the rotors are in the wrong casing. Most rotors have a small number engraved in the top under the cap (although some may be on the bottom). Some caps and casings may have grooves for aligning the rotors to the slides. When I used to send my horn to a shop that did a great deal of school repairs, I would have to check it as soon as I got home because the repair person invariably put the wrong rotor in the wrong casing, but I never faced the horror some of my students did. Their school director sent their horns in to the shop at the same time. Both were Holton 179's. One girl came in for a lesson and complained about the sound. We just did not figure it out, until the second kid showed up. The girl had rotors that read 1,3,3, while her band buddy had 1,2,2, and number one was in the 2 spot. So, moral of this story, check your rotors, and make sure your horn and only your horn is worked on start to finish before the repair person starts on another.
Deborah Buchanan _______________________________________________ post: [EMAIL PROTECTED] set your options at http://music.memphis.edu/mailman/options/horn/archive%40jab.org

