hmmm....
was there problems with the syncing? If you didn't sync it because of the quality of the sound, if you export a movie with the audio sync compresion(under the export option there should be a tab that says "audio stream", thats the one you want) at voice, it will sound as good as if it were at event. The only problem with syncing is that sometimes it lags(but normally only with a lot of music), what you could do is stream the voices, and music(if there is any), and leave the sound effects at event, to save room... the reason you would have to sync the music is because the "stop all sounds" action won't work if anything in your movie is synced(but if you simply insert a keyframe in the synced audio it will stop, so you really don't even need it). Good job with this, your a good illustrator, keep up the good work!