Hi javi
Thanks for the reply
Unfortunately (and unbelievably) this forum is almost dead indeed. 
And you’re also right with the string resonance parameters question.
Now, on the Dampers/Dampers Off thing, it looks like the Dampers layer contains all the samples up to G5 and the Dampers Off layer contains the remaining samples (from G5 upwards). But I can’t see the reason behind this. It doesn’t make any sense to me.