what is that foam that they add and then says "adding compositing materials" ? What kid of material is that and where can i get?If someone from the company read this would like to know what cam software is used in conjunction with Rhino.Building boats inside out is great for production and quality control but I can attest just how difficult it is to effect repairs and replacements on seemingly simple systems 20 years later. I own a high profile US brand and replacing a macerator pump nearly drove me insane