1) Track Camera
2) Select 2 track points and convert them to nulls
3) Create 2 additional nulls (2d)
4) Add expressions to the nulls: L = thisComp.layer("Track Null 1");(L.toComp(L.anchorPoint))
5) Convert expressions to keyframes
6) Create a dummy 2 point track on layer.
7) Copy keyframes onto Attach Point
8) Apply track to an additional null.
