I’m using a different foam rubber on FILTH. I know … amazing news … really interesting … tell us more. Since you asked, it’s from a company called Monsters Lab (how can you not want to use stuff from a company with a name like that) My reasons for changing are simple … availability and price. It’s $50 cheaper but more importantly, same day pick up. All these materials are professional grade so there’s not much difference between this foam and the GM Foam I’ve been using the last few years. One of the main characters, a rat and the oversized hand went into the oven and … all went well (see how I mislead you with the title) 3 more runs to go.