Hi Johan,
Not sure if this is going to be any help to you because I've got an N1X, not N1, and don't know if the actions are comparable.
But what I've found is that the N1X doesn't reliably produce MIDI velocity values below and above 25 and 100 respectively. So, for me, a good first approximation to a suitable velocity curve is simply:
Velocity = [25, 100; 0, 127]
In fact, I will probably never get any further than this because I'm not convinced there's any point. If I change the velocity curve my playing immediately starts to adapt to it. I doubt this is avoidable. Within limits it's probably possible (and unavoidable) to adapt to any curve. So you have to ask yourself whether fiddling about with them is worth it.
Actually I think that something along these lines goes for all the other tweaks we might make to the response and sound of the instrument, not only within PT but also in the rest of the signal chain. It's worth it up to a point and then no further. Beyond that you just have to learn how to play it.
Ian.
N1X - PT Pro - Linux