Anybody used these things? Snake oil or useful tool? http://www.sharksc630promo.com/? Phil Ethier West Side Saint Paul Minnesota USA 1962 Triumph TR4 CT2846L 1979 Caterham 7 1994 Miata C-package 2004 Suburban 8.1 2007 Saturn Ion 3 2.4 http://www.triumphtransamerica.org.uk http://forum.mnautox.com/forums http://www.flickr.com/photos/pethier