Thanks Peter! Will check out Prusa’s slice’n’dice Cut Tool feature.
No idea what best practices are? Lately, have gravitated towards grouping a set of suppressed Test related split operations/features towards the end of a timeline which can be temporarily enabled when needing to export subset of a part am needing to check fit/finish of. This approach means I can still edit/insert operations before the Test-split so (re)exporting Test .stl’s isn’t too bothersome.