Progressive Cavity Pump model

I stumbled upon a demo video on Youtube. It got me curious about Progressive Cavity Pumps so I modeled one up and printed it on a uPrint.

This is the video that piqued my curiosity.
https://www.youtube.com/watch?v=vNYm2_0zGNA

These are typically driven by a submerged driveshaft with dual universals. Being a demo made for satisfying curiosity about the working geometry, mine has a hand crank.