Folks - In addition to having a cool web page and lighting his grill with liquid oxgen, George Goble has invented a drop in substitute for R-12. Check out his wild web page: http://ghg.ecn.purdue.edu/ If you don't get sidetracked by the other cool stuff, the links to the drop-in R-12 replacement are near the bottom of the page. Good day. Bryan Gunn --