This a riff I made up using improvisation.  
    This 1st part tunes down to low C below 6-string
    E and uses the neck/bridge pu together for a 
    watery tone.
    During the transition from low C back to E,
    change pu's to the bridge/middle together 
    for the nasal sound. (this also increases 
    pickup output a bit)

    note: using banjo tuner and B & G benders

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    Key: C  (C to A) 

E ||------------------------------------------------|
B ||------------------------------------------------|
G ||-----------------------h-p--------p-------------|
D ||----------------------/\/\------/--\------------|
A ||-------------------3-0-1-0-----3-2-0----0-------|
E ||-0\low c--0-0-0-3/5--------3^0--------3---2^-0--|


    pick - mid finger - ring finger
   
    6x            4x            4x            4x 
E ||------------||------------||------------||------------||
B ||-------5p0--||-------4p0--||-------5p0--||-------7p0--||
G ||---4p0------||---2p0------||---4p0------||---5p0------||
D ||--5---5-----||--4---4-----||--5---5-----||--7---7-----||
A ||------------||------------||------------||------------||
E ||------------||------------||------------||------------||



E ||--------------------------------------------------------------------------------------------|
B ||-------5p0-------6p0-------7p0-------8p0-------9p0---------10p0---------11p0-----------12\--|
G ||---4p0-------5p0-------6p0-------7p0-------8p0--------9p0---------10p0----------11p0---11\--|
D ||--5---5-----6---6-----7---7-----8---8-----9---9-----10---10-----11----11------12----12-12\--|
A ||--------------------------------------------------------------------------------------------|
E ||--------------------------------------------------------------------------------------------|


    Key: A  

E ||--------8-10-8----12-11-10---------------------------------------------------h-p----|
B ||--8-9-10------10----------13-10-----5-----------5----------------------h----/\/\----|
G ||----------------------------------7^--7r-5-5^r--5^---------------h----/-\--5-7-5----|
D ||------------------------------------------7--------7--7p5-7p5---/-\--5-6-7-------7--|
A ||-------------------------------------------------------------7-5-6-7----------------|
E ||------------------------------------------------------------------------------------|



E ||--------------------9-5----------------------------------h-p-----5-------|
B ||--8--8--8--8--8--5-8^--^5r---5---------------------h----/\/\---8^--------|
G ||--7^-7^-7r-7r-7r-5---------7^-7r(p)5-5^r------h---/-\---5-7-5------------|
D ||--7--7--7--7--7---------------------7--------/-\--5-6-7------------------|
A ||------------------------------------------7-5-6-7------------------------|
E ||-------------------------------------------------------------------------|



E ||------------------------------------------h---0---3----------------------|
B ||--8p0-7p0-6p0-5p0----5--------------h----/-\--1^--3^r^-1^r^-0h1p0--------|
G ||-9---8---7---6----0h5-----------h--/-\--0-1-2---2----------------2-------|
D ||----------------------7-----h--/\-0-1-2----------------------------------|
A ||---------------------------/\-0-3----------------------------------------|
E ||-------------------------0-3-4-------------------------------------------|



E ||--5--5--8p5--------------------------------------------------------------|
B ||---8^-8^---8r------------h-----------8p0-8p0-8p0-8p0---7p0-7p0-7p0-7p0---|
G ||--------------8/7-5-----/-\-7p5-5-7/9---9---9---9-----8---8---8---8------|
D ||--------------------7--5-6-7---7-----------------------------------------|
A ||-------------------------------------------------------------------------|
E ||-------------------------------------------------------------------------|



E ||--17---17-20p-17---17------------------------------------------------------------|
B ||----20^---------20^------------------14------------------------------------------|
G ||----------------------20\19-17---17--12^r---12p0--11p0--10p0---9p0--8p0-7p0--6p0-|
D ||------------------------------19-----14---14----13----12-----11---10---9----7----|
A ||---------------------------------------------------------------------------------|
E ||---------------------------------------------------------------------------------|



E ||-----------------|
B ||-----4/5----2----|
G ||-5/6-5/6---^2r---|
D ||-4/5------2------|
A ||-----------------|
E ||-----------------|