In talking to other Mooney pilots, it never ceases to amaze me how many have, or have had trouble with tracking stability on landing roll out or take off. And the problem simply turns out to be that the collar on the top of the shaft that holds the donuts together on the nose gear was installed upside down. I was one of them. I bought my Mooney from a shop in Florida that was not a Mooney Service Center. So, when I brought it home to Pennsylvania, I took it to Air-Mods over at Trenton-Robbi