My wife, who's sat in front of me many times in jazz bands playing Baritone Sax, says it sounds a lot better than a regular 6" plunger. And, it cost less than buying a plunger meant for Trombones - around $20 with shipping online for the Jolly Ball, since I couldn't find one in a shop around here, and a couple of dollars at Menards for the knob.
At first I thought I'd just use the half of the ball with the dog's handle, which I cut at an angle so the handle wouldn't be centered in front. Given the size of the bell and the shape of the bowl, this makes the mute easier to use. But I soon decided to put a knob on the other half for comfort's sake, and use that instead. All I needed to do was to use a shorter screw than the one that came with the knob, and put a plastic washer on both sides with a metal washer on the inside too to grip the bowl securely.
Here's couple of pictures. Merry Christmas, Tubenetters.







