I would like to service the freehub on my campagnolo vento wheels as they seem to be getting louder. Plus I'm sort of a fanatic on service and maintenace on my colnago. I have spoken to campy regarding removal but their response is that there is the 5mm allen wrench internal to hold the axle to unscrew the axle nut on the drive side. There is no 5mm hex internal. Any help or advise would be appreciated.