I found this on another site. It has pictures, parts list, and discussion on how to make a winger out of PVC pipe. It does work. Our very own Bob Trapp has made three for himself.
Here are the links. Good luck. Brian
http://www.refugeforums.com/refuge/showthread.php?s=e4c3906027ae7ad71748a71d6c37c3a5&threadid=238179 - Discussion on how to make the winger - very long.