Here's a trick I've yet to try...
http://www.youtube.com/watch?v=_h4Vw7JMgf0&feature=rec-fresh+div-f-10-HM
... but I'd need two wheels.
Gary Navarre
Navarre Pottery
Navarre Enterprises
Norway, Michigan, USA
http://www.youtube.com/GindaUP
http://public.fotki.com/GindaUP/