HZPiano
Congratulations and enjoy!
I'm noticing my interest in the VPC1 resurfacing as well lately.
I'm not the ideal person to answer your question, but personally I always leave the curve/touch setting completely default in my keyboard (which so far has been an FP-10 by the way), and then set up the ideal curve in the virtual piano software.
VI Labs has provided for this in an excellent way with two curves, one controlling the MIDI input mapping; the other one controlling the gain (volume) response.
Cheers and happy tinkering,
HZ