Firestone balanced the tires this afternoon. Bottom line: little change.
I got the "it's good as long as its under 26 pounds" guy. Basically, that's where they're trained to reject it, and anything under that is "good". The road force numbers he wrote down are 10, 12, 15, and 17 pounds. At face value, I guess some of those are acceptable. I'd be critical of the 15 and 17 pound assemblies, but this guy didn't attempt to match mount anything.
He said he also insists on static balance only. So I have weights only on the inner bead of the wheel (clip weights). He removed all of the tape weights and didn't install any new. I'm not sure he installed the clip weights correctly because the first time I got to about 65 mph, I heard a loud pop and a few clucks from the LR. I figured the weight flew off. Inspection at home...yep, sure enough...I lost the one weight on the LR tire. Nice.
I'm not sure I trust anything he did or wrote anyway. On the vehicle inspection sheet, I apparently have 9/32" of tread depth remaining on all (even though they really have 12/32"), and all the tires went out with 38 psi (actually, 33 psi). I don't accuse him of making up the road force numbers, but none of the other data he hand wrote is correct, so I'm curious.
So I'm pretty frustrated with it. The vibration does change a little bit each time they touch it -- it IS in the wheel/tire assembly somewhere. Unfortunately, if Firestone's go/no-go gauge on road force is 26 pounds, it's going to have to be pretty shaky to fail that test.
So I'm likely stuck with these. I'm tired of spending hours sitting in Firestone waiting rooms. If I felt adventurous, I'd take the car to a local Goodyear dealer who has road force balanced tires for me before, and if they can show how screwed up it is, I can recoup the cost of the balancing from Firestone. But that's a $100 risk I don't want to take right now. I guess I'll see if I can live with these tires for the next few years.