But I did have the wheel off today to check things again and think I can safely say that they will just 'Bolt On' for me. The holes I have on the back of my OZ's are much bigger than I remember
On the down side I did notice this http://www.projectpuma.com/viewtopic.php?f=20&t=8763&view=unread#unread" onclick="window.open(this.href);return false;
The bottom of the hole slopes so the deepest side is around 25MM, the center of the hole where the bolts would go still give me around 18mm to play with.
All went OK and they bolted right on. As you can see from the pic below its not just the stud that sticks out a bit but the nut too, for me this was OK as they just about fitted into the holes on the back of my wheels.