Black Sabbath - Symptom Of The Universe Chords & Tabs

Symptom of the Universe
by Black Sabbath
tabbed by Kramer

I don't understand it, EVERY SINGLE tab i've seen of this is WRONG.  I have a Black Sabbath Video and i 
SEE him playing it this way.  Now, he may have it tuned down or what have you, but the notes are still correct.

[ Tab from: https://www.guitartabs.cc/tabs/b/black_sabbath/symptom_of_the_universe_tab_ver_6.html ]
Main Riff
   x6 x1  x6
e|-----------------|
B|------------8----|
G|-----6~-----7-6~-|
D|--5--6~--5--5-6~-|
A|--5--4~--5----4~-|
E|--3------3-------|  if it is tuned down half, then you know what to do instead
    G  Db  G  G`Db

Part 2


e|-----------------|
B|-----------------|
G|-10----6----5----|
D|-10----6----5----|
A|-8-----4----3----|
E|-----------------|
   F     Db   C

the break down following part 2

e|-------------------------------------|
B|-------------------------------------|
G|-5--2--2-3-0-2---0--------------5--2-|
D|-5--2----------3---2-3-0-2-3-0--5--2-| and so on...
A|-3--0---------------------------3--0-|
E|-------------------------------------|

sounds much harder than it really is eh?