I've split this into its own topic, as it didn't sit well in 'welcome'...
You have too many facets for such a small object.
It could be a lot simpler with less geometry.
The curved elements are modeled inside out and need their faces reversing [they should look 'blue'].
There are many inner facets that are never seen and do nothing except bloat the geometry total unnecessarily - there are over 10,000 entities in one group - some entire models have less]
Here's how to slice a part off any group...

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