Patf
There isn't any way to adjust the way the cone installs. It is a tight fit over the inner tailcone and then I have to push it until I have a tight fit against the inside of the outer tailcone.
It seems to me that it would be self-centering with no way to be off center. That is assuming that the inner and outer tailcones are on the centerline and that the inner tailcone is not deformed.

Here are a few more pics to show how the cone fits: