As a followup on my recording with HP...
I learned a few things from the experience. HP pointed out that the bridge of a song doesn't need a melody that resolves itself. It can be good if the bridge ends with some tension leading into the verse that follows. And I did change my melody for the bridge in order to achieve that effect.
I've also been thinking about the lyrics in choruses. I tend to think of choruses as static -- each verse has different lyrics, but the choruses are all the same. That's the way I think of it, anyway, even though I know it's not always the case. There are songs where the choruses all differ in a line or two. But what I did with "Five Missing One" is keep all the choruses the same, except for the last one, which has one different line. I like the way it kind of creates an expectation that the choruses will be the same and then throws a curveball at the end. Of course, I'm throwing another curve at it. That one line that changes? I decided on a different different line for the final chorus. Problem is HP and I already recorded it the way I had it. So when I register the copyright I'll just have the lyric sheet reflect the new line. That should cover me.
After I register the copyright I'll write a post in which I reveal the lyrics, and I'll address that final change. Of course, if I can figure out how to embed a ReverbNation widget in this blog, I can make my demos available to anyone who reads this.