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:8914The motor mounting still needs some work but its a startAlter the pipe_od and pipe_wall variables for the pipe that you have. Alter the bolt_size and bolt_length for some bolts you have in your shedIf you wish to use bearings alter the wheel_radius and wheel_thickness for the bearings that you want. Check the assembly in mode 2 ( exploded for overlaps etc ) Print Pump