ORIGINAL: WhyBe
OK, I see. Maybe a feature request for a 'Clean Project Folder Audio'.
It's already doing that. But since CWPs don't generally live on the audio drive/folder, perhaps what's missing is 'only refer to projects at location 'x' that may use this audio'.
I've found 'clean to be relaible but I use a methodology similar to CJays';
All audio folders and b/u daily work in progress CWPs get duplicated to the b/u drive.
Then do the 'cleans. (first on the primary folder, if it looks good, then the b/u.
The gotcha for me is the daily save-as CWP's start adding up. So if for example I'm finally deleting old un-needed takes' late in the game, I'm going to the b/u CWPs and adding an 'x in the extension so Cake won't see them and say 'oops he still needs these old files.
Does that make sense?

Wayne