I get confused listening to it myself because of the rhodes in there.  There's a couple things going on at once, but there's defintely something growling there that I need to reproduce!     Can anyone confirm that they use a leslie, vibratone, or some kid of rotating speaker on Sky Blue Sky?  I can't find anything off google.    As for the P and C, I was on youtube listening to the demo and I just don't hear anything close to what I want to achieve.  Not that Tweedy or Nels could have combined it with other effects to get what I'm looking for.   Anyway, thank you for your input.  I'm very than