Yeah I can see that, I'm just wondering the logic behind this approach. I didn't mean you shouldn't have many velocity layers just that if you think about it, you could have 127 velocity layers with 2 round robins. Now hit 127 velocity eight times and you still only have played 2 different samples. With 8 round robins you'll know you play always 8 different samples even if you hit/play the same note velocities over and over again.
I'm not a drummer myself but I reckon most drummers wouldn't want inconsistent hits that are too apart in velocity/volume. That's actually why there are triggers and sample replacements.
