Hi,
I want to remember everybody to my sharp octahedron (=> SharpEdges154000AA000) which can be rediscovered here:
viewtopic.php?f=15&t=11276(the right one)
To follow that lead I want to present the Flat octahedron (=> SharpEdges 5052828000).
Now I have to dig out Greenhills octahedron (=> Extended OctagonalEdges A528A00145294) to make another group image.