Integrated Parametric RepRap Pre-Release 2

This is a second pre-release of the core files for the my development of an Integrated Parametric RepRap in OpenSCAD. These files contain the following:
IPR_DNA: All constants and calculations, the constants define all the possible things that make a specific robot unique. (ranging from desired build space to fastener and bearing sizes)
IPR_func: All "standard" modules, such as motor mounts, bearing mounts, hardware models, etc... currently this file "builds" the main frame out of the hardware specified in the IPR_DNA file (as seen in the attached pictures).
IPR_parts: All the actual parts you would print.

Currently there are some printable parts (although still untested):
z-axis bases
guide rod clamps (based on thing:3437)
z-axis lifters (inspired by thing:4428)

And some unprintable:
Vertexes (with no holes)

For more information visit the main documentation at:
reprap.org/wiki/Integrated_Parametric_RepRap