Kanohi Koruga, great mask of shapeshifting

This is my rendition of a Kanohi Mask of shapeshifting
Designed to fit on metru heads. I can't say whether it will fit on mata heads or not.

Due to the different shrinkage rates of various 3d printing materials, I cannot guarantee the axle will come out perfect sized on shapeways printers.
If the axle comes out too big, some sanding may be required.
If the axle comes out too small, I recommend using a small piece of blue tac (sticky tac) in the mouth of a metru head to hold it in place. Or, alternatively, one could apply a thin layer of acrylic varnish to the axle to thicken it up just slightly.