If you decide to get new nuts from the dealer just to be on the safe side, ask for the proper torque settings while your at it. Let us know what they say.
I thougt it was pretty stupid that the R56 installation instructions didn't give the torque, but just referenced a tech bulletin - how useless is that? The instructions for the R53 brace told you straight out what torque to use.
Oh well, I just guessed and used 40Nm - no movement after 3 autocross events so it seems to be holding fine.
