I like my sticks really stiff. On my 9Z I upgraded to the stiff springs listed above and it really helped to keep me from leaning on the other control. I dont think they dampen sensitivity at all. The stick "movements" themselves are exactly the same regardless of spring tension. Its a totally different effect than adding expo. It simply provides feedback to let you know if you are leaning. On my transmitter you almost can't accidentally lean on the elevator/aileron. If you are giving aileron OR elevator input it almost has to be intentional. Really cleans rolling elements up for me.