I know nothing about meshes. Can somebody look at this model?

[Roxy]

I tried to open it in NetFabb. Even NetFabb didn't know what to do with the file. And that is the tool that a lot of people use to fix .STL files.
I think you have a bad file.

UPDATE: I did finally get it pulled into NetFabb. The mesh has many, many errors. I was able to fix some of the errors. But the mesh is so large that NetFabb runs out of memory. I wasn't able to even save the partially corrected part.

How is this object being generated? What ever the tools are that are generating it, I think you need to change things a little bit. You have self-intersecting triangles and you have surfaces that do not overlap properly.