GorillaPod Action/Hybrid Tripod Quick Mount
I remixed fred909's GorillaPod Mini Tripod Quick Mount to the Joby GorillaPod Hybrid/Action
This quick mount as outside dimensions of roughly 30mm x 30mm.
To quote fred909:
"Not useful on it's own. Stick it to the bottom of another model (in a 3d program or with superglue) to make the item instantly mountable in a Gorillapod [Hybrid/Action] or equivalent."