I purchased a Stainless Steel Berg Larsen 120/1/M tenor mouthpiece (same as listed in my sig) back in December of 2010 as my first jazz mouthpiece. Before the Berg, I was playing on my school's Selmer S-80 C*. I play the Berg on my Super 20, and I love the sound, but the problem is, it plays around 40 cents sharp when about in the middle of my cork. When I back it off to get it in tune, it refuses to stay on my neck. I've had it recorked with a very large cork and have used plumber's tape before to hold the piece on, but it still wobbles. Is there something I can do to get this thing to play in tune? Or should I just look for another mouthpiece that will give me a similar sound but will stay in tune and more importantly, stay on the neck?