Okay, so here's my take on Ion Square. My first tab, so..take it easy on me.

So Kele plays this on a lower pitch with an Octave Pedal. He seems to be playing 
it low on the neck.
E------------------------|
A------------------------|
D------------------------|
G------------------------|
B---8--10-8--10----------|
E--------------10--12-10-|

Later in the song, Russell plays:
E------------------------------|
A------------------------------|
D--------------------------9---|
G----7-10--x18-then---7--10----|Plays that twice, fast.
B---8----------------8---------|
E------------------------------|
Then he goes back to..
E---------|
A---------|
D---------|
G----7-10-|
B---8-----|
E---------|

An easier way to play is this:
E--------------0----0-|
A-----1---1---1----1--|
D----2---2---2----2---|
G---3---3---3----3----|
B---------------------|
E---------------------|

Kele plays this for chorus.
E--------------|
A--------------|
D--------------| However many times needed?..
G--------------|
B---1--3--0--0-|
E----1-----3---|

And then Russell plays this during "I carry your heart.."
E----------------------------------|
A-------------------8--8--10--10---|
D---10--10--10--10---10-10--10--10-|
G-----10--10--10--10---------------|
B----------------------------------|
E----------------------------------|

Then this during "I carry it in, my heart."
E----------------------------------|
A-------------------8--8-----------|
D---10--10--10--10---10-10--9--9---|
G-----10--10--10--10---------10-10-|
B----------------------------------|
E----------------------------------|

After Kele goes back to what he played in the intro.
Its his main riff throughout this song.

Then Russell plays:
E--------------------|
A------1----1----1---|
D--------------------|
G---2-3--2-3--2-3----| Hammer-on the 2 to the 3.
B--------------------|
E--------------------|

Then he plays:
E-------------------------------------------------------------------|
A---10--10--10--10--11--11--10--8--10--10--10--10--11--11--13--13---|
D-----10--10--10--10--10--10--10-10--10--10--10--10--10--10--10--10-|
G-------------------------------------------------------------------|
B-------------------------------------------------------------------|
E-------------------------------------------------------------------|

He keeps playing that till the 2nd Chorus, then..
E-------------------------------|
A-------------------------------|
D--------------7-10--10--9--9---|
G---10-10-10-10----10--10-10-10-|
B-----8--8--8-------------------|
E-------------------------------|

After that..
E---13-12-------------------------------|
A--------15-13--------------------------|
D------------- Russ plays this about 15-| times.
G---------------------------------------|
B---------------------------------------|
E---------------------------------------|

Then changes it up a bit to..
E--------12-15-|
A---13-15------|
D--------------| He plays that till the "Ohhhs" Kele sings.
G--------------|
B--------------|
E--------------|

In which case he plays..
E---13-15-13-15-13-15-12-13---13-15-13-15-13-15-12-13-|
A-----------------------------------------------------|
D-----------------------------------------------------|
G-----------------------------------------------------|
B-----------------------------------------------------|
E-----------------------------------------------------|

And Kele finishes off playing..
E-------------------------|
A-------------------------|
D-------------------------|
G-------------------------|
B--------3-3-3-1-1-1-0-0--|
E---1-1-1-------------3---|

And Russell finishes playing this.
E---13-15-13-15-13-15-15-17--13-15-13-15-13-15-15-17--|
A-----------------------------------------------------|
D-----------------------------------------------------|
G-----------------------------------------------------|
B-----------------------------------------------------|
E-----------------------------------------------------|

And there you have it folks.
Enjoy.