Gone Shootin'

I've had a lot of requests for this tune, so I'll post instead of mailing.
This probably isn't entirely correct, so I would appreciate anyone
letting me know of any revisions, corrections, etc. I play this on an
acoustic (it's all I have at my disposal for the time being), and it sounds
pretty close (to me, anyways :).
Have fun.
P.S. In the tab, the 's' indicates a slide and the 'h' denotes a hammer-on.
Also, it sounds quite good if you pluck the lower strings with your
fingers rather than using a pick.

INTRO:        
e-----------------------------------------------------------------------
B-----------------------------------------------------------------------
G---11--------------11--------------11--------------11------------------
D---11--------------11--------------11--------------11------------------
A---9---------7--s--9---------7--s--9---------7--s--9---------7---------
E---9-----7h9-------9-----7h9-------9-----7h9-------9-----7h9-----------

MAIN RIFF:    e-------2---2--x--0---0--------------------2--2--x--0---0---------------
B-----------2--x--0---0---4-------------------2--x--0---0---4-----------
G---2h3-------------------4---2h3------2h3------------------4---2h3-----
D---------------------------------4---------------------------------4---
A-----------------------------------------------------------------------
E-----------------------------------------------------------------------

And then this:    e------------------------------------------2--2--x--0---0---------------
B---6------------4-----------2----------------2--x--0---0---4-----------
G---6------------4-----------2---------2h3------------------4---2h3-----
D---6------------4-----------2--------------------------------------4---
A---4------------2-----------0------------------------------------------
E-----------------------------------------------------------------------

Extro: (I think it's something like this :)
e--------2-------0-------0---------------0------------------------------
B--------2-------0-------0-------4-------0-------4----------------------
G---2h3------------------1-------4-------1-------4----------------------
D------------------------2-------4-------2-------4-------4--------------
A----------------------------------------2-------2-------4--------------
E----------------------------------------0---------------2--------------

And then play this: (again, this may not be correct)
e-----------------------------------------------------------------------
B---------------2------------------------------2-----------2------------
G------2--3--4-----4--2--4------------2--3--4-----4--2--4--2------------
D---4-----------------------4--4---4------------------------------------
A-----------------------------------------------------------------------
E-----------------------------------------------------------------------