configuration thoughts?

We have noticed that the amount of configurations in a partor assembly impact performance.

I know that I have been informed over the years to keep likemanufactured parts to a single file and go with configurations.

Example: rectangle that is 19.05mm thick and "Y" direction it is70mm, has total of 4 holes on its ends (2 holes per each end), thepart is only grows in width as in the "X" direction

Is there any rules and or thoughts on configurations?
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