thanks guys,

those are helpful tips, and great video - I'll watch the rest of it later.

BUT , BUT - unfortunately that doesn't address THE MAIN PROBLEM of my particular issue.

Lets say one is more an ORIGINAL composer, than cover artist. What the video doesn't address is: [ OK, Lets make a hypothetical song, to demonstrate.]

YOUR ORIGINAL SONG - example structure.

PART 1

PART 2

PART 3

Okay, say you just finished adding your original lyrics to Part 3. You specifically put exact chords to exact lyrics. Everything looks good.

Now you go back to Part 1. You decide you need more bars / less bars, some change in Part 1.

BAM !! - the rest of the song goes haywire!!!!