Well I wasn't going to contact the VSTi's support since my other Casio sounds good. I'm sure it is the PX5s doing funky things, even using PX5s onboard sounds has a strange feel to it. "Light" velocity makes playing soft too difficult and "normal" is the opposite. It is most noticable to me when playing fast phrases that are suppose to be quiet or loud. Can no one else feel these strange velocity curves? Also, i've tried out velocity sensors in my DAW and as I suspected, some notes need extra strength to achieve the same velocity reading as others. It might be a personal taste issue. In which case I've wasted everyone's time lol XD