The cush drive is the part the sproket attached to right?? I think that's what it's called. If so, with the wheel off the bike, it just slides right out of the wheel. If I'm wrong, I'm a dork and I apologize.
Yep, that's what you need! Heat and slide hammer... I know, I just did a set the other week. Call the Guys at AMS Ducati, they sold me a set for a supersport for around $75. If you need one you need to change them all. The rest are not far behind a bad one.