Well the wheel is a Campag Proton wheel. I already have a Vento wheel and was planning to swap the freewheel mech from that onto the proton but apparently they dont fit. I would prefer to swap the freewheel mech as i already have a spare campag cassette at home. I wont buy any campag stuff from the australian distributor as the pricing on campag stuff in australia is a joke. Any ideas on a place in the UK or US that stocks spare campag freewheel mechs?