hey i am planning on helping my friend change the timing belt on his a4 sometime soon, my s4 has a brand new belt on it, and my old a6 i actually changed with my father and we held the cam gears together with a c clamp and marked them with a permanent marker, now iv read online a few kits to do this with but seeing as we did it ourselves last time is there any sugestions on a good way to hold them so they dont move? did anyone else do it a different way? there is a difference inmessing up my car and my friends car

 

This should help-
http://www.audiworld.com/tech/eng35.shtml