Hi Chris, yes having 10,000 faces in one object is quite complex, especially when most of them are fillet surfaces.

It looks like that deck plate contains about half of the face count of the entire model so that's probably the main thing to try and simplify.

I'd probably try extracting the top and saving it off to a separate file and replacing it with just a blank plane while working. Then bring the super heavy detailed top part back in only when ready to export.

- Michael