Hi, I just received a lewis alto mpc. This is more or less the same as yours but in hard rubber. I have an old dolnet sax I am trying to repair but who mostly works ok. I only had a selmer S90 who sounded almost good on hiw but the Lewin test give a really mellow sound, all the notes are softer but easier to blow. There was a strange phenomenon with the low G that was "harmonizing" really easily, with the lewin it's gone. Good catch for 4.95€.