I recently installed new tie rods on my 98 Expedition and screwed up my tow so bad I was all over the road. I tweaked it back in myself so I could at least get it to the shop for an alignment right away.

I have read here that installing a caster kit and having it set to the max + caster will improve straight line handling and reduce wandering... I could do it for $50 or have the shop install for $100, question is how much improvent should I expect, is it worth the extra $100 bucks? Any feedback would be helpful. EXL.