Josh;
Larger blanks turned and finished on the outboard side without a tailstock do call for creative solutions. The donut chuck is probably the easiest for whatever you can't grab with the chuck, provided you have a chuck that will fit on your outboard side. If the chuck is not available a glue block and faceplate along with donunt type chucks actually work pretty well allowing you to hold from each end and finish off the piece.
Just a note, I've never used a donunt chuck with shrink wrap, sounds creative but I just don't know if I would trust it or not.
Trying to eliminate sandpaper - one curly shaving at a time.