I know what that's like. You do something, think you did a great job, then a few days later you go over it again, and find TONS of obvious mistakes that you can't figure out how you missed the first time... But oh well, work on it later, there's at least something there, and there's several other tracks to work on...
Yea, lets just say my first few revisions of the Opera for the FFVI MSU-1 mod weren't as good as I originally thought, lol.