Or, the mouthpiece or the horn? Which is more important? Yes, I know the single most important item is the player. Then perhaps the mouthpiece, and finally the brass instrument itself. But this post is in response to another thread on Kanstul flugelhorns in which the mouthpiece question came up. Just wondered that since I can make any of my trumpets sound almost identical to a flugel horn, and can make my flugelhorn sound almost like a trumpet by simply substituting a different mouthpiece, which, in your collective valued opinion, is the most important? And as far as players go, my former teacher could make any of my trumpets litereally scream with joy...including my YTR-2335! Just to illustrate that in the end, it is the player. Hope to be able to someday do the same!