I haven't tried to fine-tune the curve more, maybe further optimizations are possible.

... of course, they are:

Velocity = [26, 52, 65, 73, 105; 0, 33, 71, 84, 127]

(Pianoteq v5.0.1)

see also http://www.forum-pianoteq.com/viewtopic.php?id=3489

In Pianoteq v3.5.3 I have good results with:

Velocity = [26, 105; 0, 127]

I haven't tried to fine-tune the curve more, maybe further optimizations are possible.