Forget the underscore comment. I misread where the individual elements needed to be broken down.
Thanks Jim for your neat solution. I missed the trailing slash.
If you're running this from within the equipment folder, remove
equipment/ from all of the RegEx patterns (only from the patterns) in that example, and make sure the redirected-to URL does include the full path of the new location.
I'm losing signal for large chunks of this journey. I've travelled a long way during the latter course of this thread. WebmasterWorld beats reading a book.