This is my favorite modification so far.
What does that modification do for you while riding? (Strictly speaking, it's a centering spring, not a damper... a damper uses fluid or other means to absorb energy and not return it in a rebound like a simple spring does.)
I like the tighter steering and the ability to steer from the rear when pushing or pulling it into bike a bike rack or around the garage. I can lift it one handed off the center stand move it easily. It also compliments my seat which is the result of my attempt at upholstery.