Did you buy your vortex muffler? <a href="http://www.nutech2000.com/prod10.htm" target="_blank">http://www.nutech2000.com/prod10.htm</a> <a href="http://www.nutech2000.biz/" target="_blank">http://www.nutech2000.biz/</a> I'd love to know how it compares to aero?