I've been searching for mutes for my Schilke X3L trumpet for several years now. I bought the Denis Wick adjustable cup mute early on, as it was the only option I could find that would fit the large bell taper. I'm looking for other mutes (particularly straight mute) to upgrade my set to something that works well and plays in tune. My Vacchiano straight mute and Harmon aluminum and copper Wa-Wa mutes sort of work, but they grip the bell poorly and seat really deep. I'm always afraid they'll fall out in an inopportune time, and I'd hate to damage my mutes since they're become so expensive to replace. I'm considering adding a layer of thin cork to the factory-installed corks to help them fit better, but I am interested in other mutes that may actually work better. Any suggestions?