Ed,
Walter's LB mouthpiece made a HUGE difference for me on bass clarinet. I cannot rave enough about it in terms of its sound, projection, and (above all) RESPONSE throughout the BC's range.
Plus, Walter is a joy to deal with. At least count, I have 7 of his mouthpieces in different models and facings spread between my clarinets. It's amazing to me how I can call Walter, describe to him what I'm looking for, and then when the mouthpiece arrives in the mail it's love at first note. As much as I love his LB mouthpiece on bass clarinet I'm equally impressed with his Kaspar-style mouthpieces on soprano clarinet. I'll have to start a separate thread to rave about them!
Roger