MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.

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You can directly import them in Sketchup and rework. I just tryed with the Standard version and it's imported correctly, no error and manifold object. Providing you an SKP is exactly what I would do to you...
Regarding your interrogation on which material would fit the job better, I'm not sure ABS would work correctly since it's a softer plastic than PLA (tendency to bend rather than break). But prove me wrong, I'll be glad to have your test result.