No problem! I remember having a great time when I first discovered all of the info that Suzuki makes available about their mouthpieces :). I really wanted to share it.
Thanks for the confirmation by the way. If the “half-blocked” mouthpiece hole is on the Hammond 44 then it must be intentional and for good reason.
My initial reaction was that it was simply there to divert airflow downward to the air chamber. Your comment about the narrow airflow having a positive effect on note bending seems sound though! I think that perhaps the increased resistance might help prevent notes from going significantly sharp during their attack as well.
Do other melodicas have different mouthpiece holes & can anyone comment on them?