::Partial Resolution::
Possible Issue
I had found the spherical bushing had been spun all the way clock-wise (on the arm side). I presume this had happened when the alignment guys were tinkering.
The Fix:
Re-centered the arm on the spherical bushing
Removed the bolts that hold the SPL arm to the frame and applied a liberal coating of White Lithium, then re-tightened said bolts.
The Result
I do believe i have significantly reduced the HUMMMMMMMMM noise i previously had.
Just a note for those who have noise issues like myself
