Originally posted by dr_hfuhuhurr
Where would you want to use the Soft, Medium, and Hard arms respectively? Also, should you use them consistently from front to back?
In general softer arms provide more traction while harder arms reduce traction. So on a high traction carpet track with foams you may want to try the hard arms. On a dusty parking lot track using rubber tires the soft arms might be a good choice. They should be a consistent hardness from left to right, but not necessarily front to back.
These are for fine tuning, i.e. you have a good working setup already, but you still want to slightly alter the cornering balance of the car. Changing an angle (camber, toe, shocks, etc.) or springs/damping might offer too much of a change and/or have a negative side effect, so these are just yet another tuning option.