hello i just ordered a Zex dry kit for my stock motor hayabusa. my question is which power commander do i need the pc3usb or pc3r? stock motor and exhaust. i have already streched 8in geared -1+2 with shinko and i like to play at strip or on street. maybe 1 day i have cash for big motor 1507 but till then my little dry kit will spice up our love affair