I could be mistaken but I think your Morino has 6 reed blocks, to fit 62 notes 4 voice on blocks with 20 or 21 notes. My Artiste X S has just 5 reed blocks, holding 28 notes each, for 56 notes in 5 voices.Interesting. My (4-reed) CBA Morino has 62 notes and its case was not wide enough for a 96-bass (37 treble keys) PA. So I am surprised that the Artiste XS should be significantly wider (I think it has somewhat fewer notes). Now the depth of those CBAs of course is a different matter: the corresponding height of the case is way more than what would be needed for that 37-key PA.