I just installed them on my car.. the whole concept and how they work is pretty cool. My question is when you guys put them on your car, what/where did you adjust your plates before you had your car aligned? The whole positive/negative numbers they give you as a suggestion in the instructions are not helping me out, I dont understand that part. Did you guys just center up both the plates and tighten them down before you got your car aligned? And also what did you all pay for your alignments with that set up (caster camber plates, and lowerd car). Any input would be cool.