Imported STL files missing faces on corners

When I find models from sites (like Prusa and Thingiverse), and want to tweak within SU to later 3D print, very often the imported STL file is missing faces especially on corners. Attaching image here for a recent example. I can go in manually and correct them all, but if there’s a trick or extension that might help speed things up (or something else I’m missing), I would appreciate any input.
Thank you

Set the units for import

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Brilliant! Thank you!!
(Note to self… ask sooner… :wink: