Holy cow... you gave a ton of information to unpack, my initial advice for next time is: SLOW DOWN...

You have a single problem of sudden, uncontrolled onset of positive camber. Next time, focus just on that one problem and take it one step at a time. Your initial problem triggered you to get into every single suspension component from pitman arm, LCA, A-arm, strut, all bushings and a torsion bar.. all of which makes it more difficult to isolate and diagnose how you got your positive camber problem. (Are your new pitman and idler arms the right length?) A suggestion for next time; try and fix one element at a time and figure out which specific element is or was the problem.

OK... if the squeal went from bad to worse on your ride back from the show, and you can *see* that the camber problem has returned (You wrote "but they already did that...twice...and it isn't holding") then I'd start by inspecting whatever controls the camber - which IIRC is the upper A-arm and eccentric washers with the thru-bolts. Start looking for "skid marks" in the steel at those bolts, evidence of recent movement at the slotted bolt holes, and steel "ears" that hold the eccentric bolt washers. I expect you'll see evidence of movement. The positive camber condition will require you to return to the alignment shop and explain what happened, and have them correct it again. Did they not torque the upper A-arm bolts down? Are the bolts worn out or incorrect or the eccentric washers not seated properly?

Of secondary importance is to document the wear pattern on your tires, if any: More on inside edge?, outside edge?, are they inflated to property pressure, etc... that can help confirm the positive camber problem.

Cheers,
- Art