Parametric Peristaltic Pump

Or was that a perimetric parastaltic pump ?

This is a peristaltic pump built in openscad.
There have been a number of peristaltic pumps recently and I thought a parametric one would be cool.

http://www.thingiverse.com/thing:8652
http://www.thingiverse.com/thing:8914

The motor mounting still needs some work but its a start