Hi all , I thank each and every one of you , for his \her contribution to my knowledge base of the instrument . however, the difference between bell flares and throats is very clear to me . All I'm saying is that the direction of interchangeable throats seems to be an interesting challenge for horn custom makers , as it has more influence on the playing character. yours ' Alon _______________________________________________ post: horn@music.memphis.edu unsubscribe or set options at http://music2.memphis.edu/mailman/options/horn/archive%40jab.org