thats just a guess, but take a front wheel off and grab the top of your caster block, and move it forward and back. if your car is anything like mine, there will be a sizeable amount of play there.

i hear where your coming from with the more money, less slop thing, but im the kind of racer who likes to make whatever i run as good as i can make it, and doing this will hopefully make my car a little bit better. (probably wont notice a thing on the track, but in my mind less slop = easier setup and more consistent)