Here are parts 2, 3 and 4 of the vortex articles. http://autospeed.com/cms/A_3059/article.html http://autospeed.com/cms/A_3060/article.html http://autospeed.com/cms/A_3061/article.html
Paul Smith Brisbane, AUSTRALIA pk.sm...@bigpond.net.au http://kr2spacemodulator.blogspot.com/
