Bouncy! A talented and bouncy guy the Professor! :biggrinjester: By 1998, I had finished version 4.0 of TreeMaker, which, in addition to including many algorithms for the origami design, incorporated a powerful numerical optimization code, CFSQP developed by Professor Andre Tits and his students at the University of Maryland (the code is now licensed and maintained by AEM Design); this made it run very fast. Great smilies by the way.. I like the Joanna Newsom one :m21: Shaun.