Originally Posted by
MudPie
...Also, you might want to send the pic to Park and see what they have to say.
I'd take the new cassette and lockring tool to the LBS where you bought it. Ask them about the tool. See if they have a lockring tool that fits. In fact, you might take the wheel with you and get them to take off the cassette.
If you were to contact Park, what would you want them to do?