After installing and checking release 3.0 I got a big smile on my face - the fill delays are gone!
Although significantly present in few styles only, this was something it shouldn't be there. Ketron engineers said they would try to fix it and they did it! And perhaps I feel even more satisfaction now as if it there was no problem at the beginning - I've also experienced, how it looks like , if a company cares about their customers!
I'm sure many of you guys will soon have your wishes implemented in the keyboard!

I also want to say thanks to Ketron AJ, who found some of my very old postings and informed me about this matter!

Luka