Opening up this thread again. I put two washers all the way around, and my fronts are much quieter. The rears however are actually noisier over rough pavement, but the single clink when the rear end drops over speed bumps and curbs is gone. Pushing up and down on the rear bumper is actually perfectly quiet now as opposed to the soft clink I could reproduce before.
But I drive over rumble strips every day (I guess for idiots who don't notice the 90 degree turn coming up), and it sounds like someone is shaking cans of change on the top of my struts when I go over them.
Before I put on the washers in the rear, I could actually see the threads end before the top of the washer "metal disk" so I know there was some play before. I think what I did with two washers on top was bring the metal dust shield closer to the top but not tight enough.
Unfortunately, I'll have to take damn struts out of the car again to put rubber washers between the metal dust shield cap like Shasta did, but this is what I'll be doing when I find the time. Having a hard enough time getting my FIC to work and fix our stupid hesitation. If I had $10 for every hour I've put into this car this past 12 months, I could have bought another car by now.
Shasta, did your rubber washer trick work permanently? I am pretty sure this is my problem. By the way, I have an MSP and I have the Tokico HPK installed (both struts and springs). This lowered the car about 1.5" all around. Looks good, but I want these noises gone.