Just got my JP231Rath through and I totally love it. Now, having spent the past 9 years playing a .547 bore and a large shank mouthpiece I have been suddenly comfronted with a 12c and a small shank... (the .525 bore isn't a problem). I normally play with a 51L and because of this "change" as it were, I'm struggling to get used to the 12c that came with the Rath231... I have played it for about 2 hours already but I feel I need a slightly deeper cup and maybe a slight bit more mass to the mouthpiece. I'm not too "with it" in terms of small shank mouthpieces and what they relate to so any help would be appreciated. I have got a 6.5 AL which I might try and get another one in a S-shank as I quite like that one for when I first started.