Feature Request: add "Contains" to Kind matches.

I often encounter this type of situation:
I want to process a group of related files of different kinds (i.e. movies - MPEG Movie, QuickTime Movie, AVI Movie; or archives - 7zip archive, zip archive, far archive), but I have to specify each file type individually (either by kind or extension).
For example:
I have three files in my Downloads folder that I want moved to my Documents folder:
File.pages (kMDItemKind: Pages Document)
File.numbers (kMDItemKind: Numbers Document)
File.key (MDItemKind: Keynote Document)
The condition "Kind is Document" does not work*, so I have to set up a separate condition for every file type (and there are a LOT more than three!).
My Request is this:
Is it possible to add "contains" to the "Kind" conditions? "Kind contains (variable)" would allow easy grouping of similar files for sorting / processing.
*edit: after more research I realize that this should work, but it does not.
Thanks for your attention!
RC
I want to process a group of related files of different kinds (i.e. movies - MPEG Movie, QuickTime Movie, AVI Movie; or archives - 7zip archive, zip archive, far archive), but I have to specify each file type individually (either by kind or extension).
For example:
I have three files in my Downloads folder that I want moved to my Documents folder:
File.pages (kMDItemKind: Pages Document)
File.numbers (kMDItemKind: Numbers Document)
File.key (MDItemKind: Keynote Document)
The condition "Kind is Document" does not work*, so I have to set up a separate condition for every file type (and there are a LOT more than three!).
My Request is this:

*edit: after more research I realize that this should work, but it does not.
Thanks for your attention!
RC