That makes sense though. I remember him saying in one of the documentaries that tripling their vocals really didn't add that much. So, why would they spend more time in the studio if they didn't have to? If it's the same pitch there's really not much need I'd think. I find the production notes from fans interesting. I have some of them myself. Lol The choir functioned to expand their sound and sometimes to fill out the areas obviously he couldn't finish in the 80s. It gets the point across. I mean at least we get to hear it!