Well, no, Doug has other time-manipulation songs (remember "Freezeframe"?) that he's not concerned about using. So that's not really an issue.
One thing you don't note is how much rewind he can do. I'm inclined to make it one-for-one -- he goes backwards from the point he starts the song, for as long as he allows the song to play. This limitation should also help him get it "under the radar" if you're inclined to think of it that way.
-- Bob
---------
Then the horns kicked in...
...and my shoes began to squeak.
One thing you don't note is how much rewind he can do. I'm inclined to make it one-for-one -- he goes backwards from the point he starts the song, for as long as he allows the song to play. This limitation should also help him get it "under the radar" if you're inclined to think of it that way.
-- Bob
---------
Then the horns kicked in...
...and my shoes began to squeak.