I had these skins fabricated last summer. I used the original skins to encapsulate the insulation inside the boiler. You will notice handles on the side. That panel comes off in 30 seconds. When the side panel is removed, the insulation comes out with it. It is awesome to clean the hex and not have to mess with replacing insulation!
http://s126.photobucket.com/albums/p83/sparkie68/Greenfire-New-Skins/
http://s126.photobucket.com/albums/p83/sparkie68/Greenfire-New-Skins/