Thanks Pete!
Yeah, I'm continuing to hack slowly away at things, but I really want folks to know that I listen closely to everything offered. For instance, Trip above noted that he wanted more development in the arrangement in the first passage -- and over on RP, Stan said he heard a George Harrison slide in the third passage ... and so I told him to go for it -- and he did.
I, too, was aware of the lack of sparkle in the lead vocal -- and so I went back today and mixed both "The Prelude" (opening passage) and "Butterfly" (third passage) and hopefully got the vocal corrected in those areas. I've not yet tended to "Mary" (the full band), because I've got other parts still under construction in it -- but I'll eventually get there.
Below is the updated file with the aforementioned updates and corrections. Since I can't update the original file on Soundcloud, I just uploaded the new one -- and THANKS so much to all for your helpful thoughts!