Thanks guys, with all this important information you've all given me, I will use it and try to analyze what is it I got to restrain myself of doing. UD is probably right referring to the amount of layered voices, which I tend to use a lot (eg. the G. Shearing Piano with vibes and jazz guitar) you can actually sense the "struggle within" by a "temporary delay" on the tempo.
Oh well! let see how aggravating this problem will become for me, maybe I'll learn to live with it, maybe not. So far the good points of this KB outweigh the bad ones.
Remember? Not such a thing as a “perfect KB”
Thanks again guys,
Mario