Elastomeric Coupling 0v1: 4.75mm stepper motor to 8mm threaded shaft

This thing is an experimental printable elastomeric coupling designed for a molded and cured-in-place rubber insert of RTV silicone sealer.
This is a revision of http://www.thingiverse.com/thing:7687

This version should be stiffer, and self centering.

It has robust clamping, and should be well balanced if tightened evenly.

HD Macro video of it being printed:
http://www.youtube.com/watch?v=rkfMtFEaQG4

Heritage -- this is a variation of these two couplers:
http://www.thingiverse.com