Any of the unreleased bonus tracks, like All Dressed Up for school. Well, I guess that was just a mix, period, as there was no original mix. I don't know if any album tracks were remixed.
Didn't Brad Elliott say that there was a mono mixdown of All Dressed Up For School, done by Brian? But it's a remix on the twofer?
I don't know about Elliott, but Badman says there was.
For an indepth analysis of this song...and the other "Today!" outtakes...stay tuned to my website...in about a week...www.beachboysarchives.com
C-Man