Trying to get Key touch like a REAL piano

Hey, I've done some comparisons to a real piano and the fantom x8 key touch. The medium key touch is way to light when compared to a real piano. You shouldn't be able to get a piano to sound that loud without raising your arms up and slamming them on the keys, but with the fantom you can get the same velocity with your hands right above the keys and striking medium hard. I tried the Heavy touch setting and it's much closer to a real piano, though just a tad to heavy when trying to trigger the loudest tone. I'm used to playing a real piano and when I set the fantom to Heavy and can play licks and runs faster than on medium (where I have to exert energy in my hand muscles to play lighter than a real piano and get it to sound the same velocity). Anyways is there a way I can fine tune the touch between heavy or medium or edit a piano patch and do something like make the 4th tone easier to trigger? Can you edit the velocity curve? Thanks

Ron