The Andy Mark 2011 FRC Kit of Parts Chassis model is presented in two different orientations. These assemblies were created in SolidWorks 2010. The individual parts have been posted to www.3DContentCentral.com So if you use other software such as SolidWorks 2009 or need neutral file format such as STEP or other CAD software you will be able to download individual parts.
The assemblies and all the parts in SolidWorks are in the following zip file:
Download 2011_AndyMark_Drive_System_for_FRC_Kit_of_Parts