Looks like speedway motors has fixed the bump steer problem .
http://www.speedwaymotors.com/AFCO-Metric-Improved-Geometry-Centerlink,48370.html?CID=1737T&email=yes&utm_source=bronto&utm_medium=email&utm_term=Image+-+AFCO+Metric+Improved+Geometry+Center+Link&utm_content=Break+Something+Again%3F+Let+Us+Help&utm_campaign=06%2F02%2F11+Race+%281737T%29
http://www.speedwaymotors.com/AFCO-Metric-Improved-Geometry-Centerlink,48370.html?CID=1737T&email=yes&utm_source=bronto&utm_medium=email&utm_term=Image+-+AFCO+Metric+Improved+Geometry+Center+Link&utm_content=Break+Something+Again%3F+Let+Us+Help&utm_campaign=06%2F02%2F11+Race+%281737T%29