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Best way to import Geometry (converted from CATIA / .cgrs)

Hello,

I have a complex CATIA assembly with numerous parts.  I am trying different export methods to maintain the most accuracy as well as the most efficient file size. 

So far I have tried to convert each of the .cgr(parts) as .SAT's.  The assembly imported into RS fine, but the file size of the station jumped to 1.3gb and has a lot of lag. 

Any ideas?

Thanks

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