I guess, it is my turn.  For years I was reading of this menace and now I am baffled.  
One thing I did and installed that foot long addition that is supposed to take care of it.
BUCKING did not stop.  And it is violent and powerful.  
I wonder if a check list has been developed by now.
I am assuming that by now we know where to start and carry on until the culprit is found.
I feel helpless, yet I know the List will come and fix it...
What shell I do?
Zoltan