In this episode from 2008, there are at least six insulators on the mantle. This scene is about one minute in. I saw a CD 154, CD 145, and maybe a CD 102 in Hemingray blue mostly hidden at the right end of the mantle, pllus two or three clear ones a bit earlier. This is a smart phone camera picture. A frame grab would have been better, but I wasn't set up to do it.