Mike Ludwig has a Ghorgon done up with greenstuff and about to start painting. Looks very good. He used the plastic giant as a base, and used all 4 of the arms. Liberal amounts of greenstuff made into matted fur on the back and chest to bulk out the shoulders and hide the extra arm joints. Head is from a plastic minotaur I believe. Looks good, fairly cheap, and usable even at official GW events.