I modeled a new version for the purpose of actually building something!

This one is big enough to wrap the motor I have, is lower profile for less off-axis deflection but wider to allow more vertical flexing, has 60 filaments instead of 30, and now prints as one piece. 

Now to add the #MPRT - Modified planetary robotics transmission drive to the inside.  

That part still needs a little work.  I'm on it.  In the meantime, the source I'm starting with to produce what you see above...is up.