I run mine through with the primer in, that way you don' t have to worry about media in the primer flash hole. You can wipe the case down later with one of those " crazy closthes" .
I like to use corn cob for polishing, and walnut for cleaning.
Should have bout a Lyman Turbo auto-flow tumbler, you just pull the plug, turn the machine on and the media drains out in a pan leaving nothing but brass in the tumbler. No need for case separators

. LOL, NBH[8D]