Slightly off-topic but there is a nice description of bump steer and how to try to dial it out in "Project Binky" episode 10 (around 23 mins onwards) and continued in episode 11, where they also go into some detail about "Ackerman" - I see that you mentioned this above so maybe you are already aware. If not - be warned! - and be prepared to invest 5-6 hours of your life watching all the episodes (addictive viewing I find).