I thought I would comment on something else related to what Daff has posted. You remain skeptical, and that is fine. I'm almost always skeptical of things until I have seen or experienced the "proof" myself. The subject of precision aligning valves was one of those things I was skeptical about and the discussion that had been going on here, along with my own curiousity was enough to cause me to undertake the burden of expense to take the plunge and to send my horn out for the service so that I could judge for myself. This thing cost me $250 by the time it was all said and done once shipping charges were included. Now, with the trumpet back in my hands and experiencing the results for myself, I'm not sorry I spent the money. Believe it or not, but don't knock it till you try it. I am confident that if you sent one of your horns out to Reeves and had them do an alignment, you would be happy with the results.