ISS Low Res Model (Part 2)

I've managed to get a couple of free lunch breaks to work on the ISS. The Truss structure is a complex thing to simplify. What do I keep, what do I delete? I've got an idea...

The JEM Module is complete. Destiny Lab, Nodes and Columbus just need arm grapple points, the Orbiter Grapple Trunnions and Astronaut Handles adding