Since I had enough difficulty with the Inventor version, then failing to import the Pro/E version to Solidworks, then with installing Pro/E, then with getting it to render anything at all.... I figured I'd post a .step of the Pro/E exported from Pro/E for the rest of us looking for accurate pyramid CAD. This one also has complete alliance stations.
A STEP of the Pro/E version of the field can be found
here.