Here's a 2007 idea from Larry Rose...
http://www.ncwoodworker.net/forums/showthread.php?t=9787
...and he built it too...
http://www.ncwoodworker.net/forums/showthread.php?t=10266
http://www.ncwoodworker.net/forums/showthread.php?t=9787
...and he built it too...
http://www.ncwoodworker.net/forums/showthread.php?t=10266