Gareth Chen suggested I should contact Philip Chapman-Bell. That's a great idea! I looked at his website, it mentions his email address but as a code I couldn't decipher. Could someone please share with me off the list his email address?
Andrew Hudson disagreed in the complexity rank I mentioned to the twist fold and the iris closure, having a different rank under the guidelines posted in the OrigamiUSA website. I had read those guidelines before, but I agree more with the guidelines that had been posted under "Origami Techniques" in Wikipedia (they had been removed in November 27, 2011). You can still see this guidelines by viewing the entry's history: http://en.wikipedia.org/w/index.php?title=Yoshizawa%E2%80%93Randlett_system&oldid=462487267 That's why I had defined the twist fold as high-intermediate and the iris closure as mid-intermediate. But still, I will post both definitions for the public domain, so Andrew and anyone else will be able to repost, or publish, the definitions with any change they consider neccesary : ) Thank you for the feedback!
