Hey Ted
This may sound too simplistic but, If I were you I would install a new set of those Lasertec tires you were running in the past with no problem.
That should solve your problem.
That weaving, wobbles at speed is dangerous, not only to you but anyone else in the area.
Trying to fix / change a bike's handling characteristics that has tires on it that were not designed for it [ radials ] sounds like a pain, and turns you into a full on test pilot.
Nick Kennedy