Half-Turn 3x3x2

FILES AVAILABLE IN INCLUDED .ZIP FILE
https://www.youtube.com/watch?v=4K5gmvtJqjg

Twisty Puzzles Museum Entry: http://www.twistypuzzles.com/cgi-bin/puzzle.cgi?pkey=5719

This is my half-turn ‘domino’. It was inspired by Oskar Van Deventer’s Half-Turn Cube, which was originally designed by Takafumi Haseda and made by Hidetoshi Takeji. The half turn cube appears to be just a normal 3x3x3, but is only capable of making 180 degree turns, whereas the traditional puzzle is capable of making turns in increment of ninety degrees.

This is its 3x3x2 equivalent, a domino-type twisty puzzle that is only capable of making these sort of ‘half-turns’. Just like a standard 3x3x2, or any 3x3xn cuboid where n is an even number of layers, this puzzle turns only by increments of 180 degrees on 4 faces, and by increments of 90 on the two remaining faces. However, in this case, the limitation of the first 4 faces has been extended to apply to the top and bottom faces as well.

In order to make i