an easy way to go back to the original is to first SAVE the original before you make edits to it. Give it a unique name....
Then, simply save your edits with equally unique names.

To get unique intros and endings..... create your own and use a combination of BB/RB and original live instrumentation ...assuming you play an instrument or can use MIDI.

I do all my mixing and final recording in Sonar so edits are relatively easy to do.

You can find my music at:
www.herbhartley.com
Add nothing that adds nothing to the music.
You can make excuses or you can make progress but not both.

The magic you are looking for is in the work you are avoiding.