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Reactor
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An Ufo meets a two layered Square-1.

This is a dihedral puzzle with four layers. The two middle layers were built up from an UFO. The centers of the top an bottom two layers are connected with the middle layers. The to and bottom rings can twist independently and consist o 12 segments each.
The hollow stickers are now one of the creators trademarks.

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Contributors

Thank you to the following people for their assistance in helping collect the information on this page: Andreas Nortmann, Lawrence Cuthbert.

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