Dealt with that problem last year. You could either look for the proper thin walled remover made by Phil Wood (long out of production), and I think a coupl of other makers from Europe, or get the Park tool and Dremel out the half milimeter or so of material from the inside of the tool to let it fit over the Campy axle lock nuts. I already had the Park tool, so I did tge latter using a small drum shaped sanding tip from my Dremel kit, being careful to do it evenly around the tool tube shaft. Only took like 15 minutes to do and it now fits over Campy lock nuts. I'vs removed a few freewheels from hubs with it since with no problems. Thereis enough material on the tool's tube shaft that doing so does not compromise the tools strength.