Sam Phillips - So Glad Youre Here chords

Okay, so the one tricky thing in this song is the opening which goes back and 
forth between a C and some kind of crazy diminished chord.  I don't know what it 
is exactly, but I play it as (low to high) x4301x and have named it a Csus4/C# 
below.  Sounds close enough to me.

[ Tab from: http://www.guitaretab.com/s/sam-phillips/265214.html ]
C        Csus4/C#             C     Csus4/C#
Nothing about us looks good on paper
F              Em                        Am
But paper’s no good in the middle of the night
Dm             G
So glad you’re here
Dm            G
So glad

People do all the wrong things for the right reasons
Somehow you understand this
So glad you’re here
So glad

F
The more I lose
Em 
The more I know that
Am
Now is really all we have
F                  C
Now is all we have

I remember the day you were born
I wasn’t read y; I was scared
So glad you’re here
So glad