Biffy Clyro - Scary Mary chords

Very rough chords for Scary Mary by Biffy Clyro. They're probably mostly wrong, as this 
is my first tab, but I got fed up with there being no chords for this song on the site.
Feel free to comment and correct these, or use them as a guideline to work out the 
chords for yourself... or just ignore them if they're too bad :P
Listen to the song to work out the strumming pattern - it's fairly simple :)
Thanks! T.

Intro: C B6 C F Em F

C         B6 C       F
what must i have become
      Em                          F
to deserve all the shit that you gave me?
    C                 B6 C        F
the rocks look like a body in the river
    Em                 F
now i just wish that i could sleep
[ Tab from: http://www.guitaretab.com/b/biffy-clyro/265804.html ]
Dm  Em          C
to keep me from thinking
                 B6 C
but the thoughts keep me up
         F
its been two months since you
Dm            Em   C
taught me not to trust
             B6 C F
but you kept your promise

Dm      Em               F
you made patterns on my face
Dm            Em              F
you painted pictures with my tears

Dm
and you did it again
                  C  D Em C
i knew that you would
Dm
thank you for showing
            C D Em C
me there's more

(Guitar bit, try chord progressions from previous verses)

C
wash off your hands
    B6 C        F
its time to let go
release them
C
give time to your heart
      B6 C          F
give time to your soul
                   (end on C )
release them all


Sorry, I bet it's all wrong.