To CorpsLife, by old I mean our set wasprobably five years or so old. When the A corps picked up a sponsorship from Yamaha, the Cadets corps got the old Dynastys from them. Terrible instruments, so after all of the euphs breaking, we got a newer set of Yamaha horns this year, and didn't have much problems at all.
In retrospect to the Yamahas, after breaking the little alignment guard in my second valve this season, I found out that a Yamaha baritone valve will fit in a euph, and move beautifully, but it won't work the other way around.