Cleaning the Gusmer D-Gun: Brass Backing Felt Part 8 Announcements / Foam Insulation News Posted by Admin on Sep 04, 2006 - 12:15 PM Cleaning the Gusmer D-Gun Brass Backing Felt is an important step when installing a new mix module.  Here you can see the old one being removed or a new one being inserted.  A mix module by any other name is blasphemy and usually plastic, lol. This article comes from Canada Foam Insulation   http://www.foam-insulation.ca/ The URL for this story is:   http://www.foam-insulation.ca/modules.php?op=modload&name=News&file=article&sid=25