Reply to "Alignment and Bump Steer"

.....or to put it another way, when your car hits a bump with one wheel, as that wheel rises it pulls on its steering arm and changes toe-in, which you feel as an unstable momentary twitch. Bump steer corrections are completely different from adding caster for better high-speed stability (with both wheels on smooth pavement). You can adjust but not entirely eliminate bump steer by lowering the rack, or by raising the steering arms.