If there is a portion of the model that has no data at the centerline, you will not be able to unwrap it satisfactorily. Similar to this post: viewtopic.php?f=38&t=25415
. If you can manipulate the model to have a "toothpick" center, then you may be able to do it, but that creates its own set of problems.
Best way is to set up and machine 2 or 4 sided, rather than wrapped. And as stated numerous times, better results are usually achieved when leg blanks are bolted to the table or a jig similar to Russell Crawford's than on a rotary axis.