MakerBot Caster

This is a parametric caster modeled in the form of a MakerBot. It is derived from the OpenSCad script Printable Key Rings by catarina http://www.thingiverse.com/thing:1378
The script allows easy adjustments of the caster's height, width, wheel width, wheel diameter, wheel position, bolt hole size, counter bore holes etc. Echo statements within the script provide approximate mount height and required bolt lengths for the wheel base. On the wheels, is an embossed profile of hoeken's Gator clip http://www.thingiverse.com/thing:507.
OpenSCad is still new to me. I encountered difficulty in getting the embossed profiles from the extruded dxf to translate correctly with adjustments to the wheel base parameter. If someone can enlighten me on solving this issue, it will be much appreciated.
I have uploaded the .zip file of the script along with catarina's included code and hoeken's dxf. Also included are the .stl files and g-code for my print. This has a wheel diameter of 35mm, wheel width