[ctmartin]

"timcissel"'s reference to the vocalist's abilities is really important. I'm not sure this is *exactly* what you're asking, but depending on the phrase, the BGV's might modify the ending vowel -- and it probably won't be noticed depending on your mix.

For example, the main vocal may end on a hard "e", like "me", and the BGV's might be better doing "e-ah" -- just a slight "ah" at the end so the "e's" don't stack-up too much. Something like this might make the BGV's easier and more natural to sing if they're in a higher register too. These types of decisions rest on the producer & the vocalist(s), and your ability to think of alternatives that stand differently in relation to one another, but work within the context of the vocal nonetheless.

Hope something in there helps...

Peace,
C