Terry,
I've heard a "comfort" level in your vocal pieces before, and I'm sure that you have enough confidence to keep singing. Sometimes, when we get something new .....(Tyros?) your own ear "wants" to hear that new thing and we subconsciously pump up the "fresh new sound". I notice that in some of my recordings ..... if I'm playing a Hammond or a Rhodes sound that I really get into ... I tend to let them take the lead position.
I have only one small comment on the vocal duels: since the range and tone is so closely matched, why not try to EQ the second voice so there is a more distinct "entrance" when it chimes in. Maybe cut the bass or boost the upper mids .... something to differenciate it from the lead voice.
I'd also do less unison and more separated harmonies....but that's just me. I want to hear the Four Freshman on everything.
(With the Tower of Power backing them !)

[This message has been edited by Uncle Dave (edited 02-22-2003).]