I'm trying to put a new Dura Ace cassette on a new set of Velocity Spartacus wheels. When I put the cassette I seem to have some play. I even tried pulling my Ultegra cassette from my Dura Ace wheels and had the same issue. Am I missing a spacer that might be needed with the Velocity hubs? If so can I rob a spacer from my Ultegra cassette to make it work?