So, I'm part of the team 'Descartes Specials' (Melmo, JoJo the Gun Show, Claire, Nermal and myself).
We've entered 2 of the 5 presentations to date.
Our first feature item was tin: https://docs.google.com/file/d/0By-rIWmQfuLld1Y2eklTT1EtbW8/edit?usp=sharing
Our second feature item was lead: https://docs.google.com/file/d/0By-rIWmQfuLlSVlqb0M3aTkwX0k/edit?usp=sharing
3 more to go: gold, bone and oil.