Album Artwork

[simbun]

To avoid having to deal with illegal characters and lengthy song titles I have a very flat file layout:

%ALBUMARTISTSORT%/%YEAR% - %ALBUM%/%DISCNUMBER%.%TRACKNUMBER%.flac
%ALBUMARTISTSORT%/%YEAR% - %ALBUM%/%DISCNUMBER%.cue

So I have all the tracks for an album/boxset in a single folder.

I've always embedded album art, but I've just worked out that I'm using about 7GB of data, when storing them externally would only take up 480MB. The other reason for storing them externally is for compatibility e.g. MinimServer doesn't read embedded ogg vorbis album art.
I've just played around with automating the removal of art and padding from the files only to realise that my assumption of MinimServer's artwork rules are wrong; I had thought that it would read from a file named %discnumber%.[jpg|png], but it doesn't, and that kinda breaks where I was going with this.

I know the rules around artwork are already quite complex so adding anything to that is best avoided, but with %discnumber% there's just one rule I need to follow for all the scenarios (except group art obviously).

I know I can change my layout to have one folder per CD and stick with folder.jpg, but I just find it a little crude/unnecessary - especially with albums with just one CD.