In my opinion, OS4 is complete, and they are merely making us wait until the show in Germany so they can make a big deal of the release.
Of course we won't know if I'm wrong because I'm certain no one will answer this, and most likely won't read it.
I'm slowly beginning to believe that Ketron, at least in Italy, has no regard whatsoever for their customers, once they have our money.
DonM