How do I reduce file sizes of assemblies?

I have a large assembly file that a client is trying to open to pull out the structure to send for analysis by a structural engineer.  They asked for a SW file, but say the file is too large to work in.  I have stripped the non-essential details from the model; it is still too large.  I sent along the advise to open in "large design review" mode, and show the model in "Shaded" view rather than "Shaded with Edges".  Any other ideas?

Thanks in advance,

-Dave

SolidworksAssemblies