Tetrahex Twinform

Tetrahex-Twinform. This demanding puzzle was René Dawir's exchange puzzle from the IPP30 (International Puzzle Party) hosted in Osaka & Hakone, Japan in August of 2010. The puzzle contains 6 pieces.  Each piece is made of 2 tetrahexes which can rotate around an axis.  The goal: Disassemble the twinform and then assemble the 6 pieces into the twinform shape as pictured on the insert.  A twinform- Tetrahex-Twinform.