I’ll add my update here as well. I attempted the camber plate install today, using an electric impact wrench, assorted impact sockets, a sledgehammer (!!), and a spring compressor from Harbor Freight. The passenger side went smoothly, but that’s only because I made my mistake on the driver’s side first.
Once the new camber plate is installed on the strut assembly, you lift the assembly into place and insert the three upper strut bolts through the corresponding holes, and place the washers and nylock nuts onto them to hold the strut assembly in place. Then you tighten the three nylock nuts to 33 ft.-lbs. The three upper strut bolts are tack-welded to a flat ring on the camber plate assembly below, so they won’t move.
Unfortunately, I was following the Vorshlag instruction page
and mistakenly thought it showed them tightening the upper strut nuts with an impact wrench before making the final torque setting. So I did the same. But only halfway down the upper strut bolt, one of the nylock nuts started spinning the bolt freely. The tack weld had broken.
Evidently the tack weld could not hold up to the vibrations of the impact wrench.
Fun fact: Although the tack-welded (or not...) upper strut bolts have an Allen wrench fitting, it is impossible to fit an Allen wrench into that hole with the camber plate installed on the strut. After about 30 minutes trying to figure out how I was going to loosen the nylock nut from the bolt with the bolt spinning freely, I finally took a Dremel with a metal cutting disc and made a slot in the top of the bolt so I could hold the bolt steady with a flat-blade screwdriver while I used an open-end wrench to take the nut off. That worked, and I was able to remove the strut assembly from the car.
I’m going to call Vorshlag in the morning and ask them to send me another ring with the three tack-welded bolts on it. Worst-case scenario is that they make me pay $30 for it. (They sell it as a separate assembly for dumb people like me.)
At any rate, as I said, the passenger-side assembly went on with relative ease, since I VERY CAREFULLY used only a socket wrench and a torque wrench to tighten the nylock nuts onto the upper strut bolts on that side.
TL;DR: Don’t use an impact wrench AT ALL when installing the nylock nuts onto the upper strut bolts. Use only hand tools for that part of the installation.