Hello all. I'm new to the Hamb and recently started building up a 1949 Ford Convertible. I'm in the process of flipping my uprights and have a question regarding caster. I've read many discussions regarding this topic and most say to swap the driver and passenger uprights during the flip process. I have a background with building long travel off road cars and somewhat versed with bump steer, etc. that effect ride quality. I see that if the uprights are swapped from side to side, the caster becomes negative, or reversed. This can't be good as the car will not self center and track correctly.. Question: Why are so many people advising to swap uprights? Why not just flip the upright and keep it on its original side. (Obviously the spindle will not get flipped in this process). By not swapping the spindle, the caster remains the exact same as it was originally. The only real change I see it that king pin location simply gets moved back about 3/4 to 7/8 back thereby shorting the cars wheelbase by the same amount. Please help give some insight and let my know why I need to swap from side to side.. Thank you in advance!! Danny PS I know one can purchase dropped uprights.. and their benefits... I'm hoping this thread stays directly on the topic of distorted/changed geometry caused by flipping spindles. For example, flipping the uprights pushes the spindle out slightly while increasing the scrub radius.