What up? What is the difference that players perceive between the Yanagisawa HR MPs compared to the Yani metal MPs? This is for alto saxophone. I have yet to play a Yani metal MP. I love my Yani HR 5 that came with my A990 when I bought it in 1993, but I have out grown it considerably. It fells like blowing trying to blow **** through a rats ***. Hah! What should the tinbre changes be if I switch to a Yani HR 7~8 or the yani metal 7~9??? All suggestions welcome. Especially the funnyones!!!!! But seriously can you tell me what MP I should buy?!?!?!