rb5 sp2 servo saver spring

[reg]

Hi,i seem to have a problem with my steering,when the car is stood still,the steering wont go on full lock untill i push the car foward,the servo saver is done up as tight as i can as to still have the bearing sitting inside the adjuster,but the spring is still to soft and is letting the servo saver open when im trying to get the car to turn in,then it will snap shut,this is what i think is giving me unpredictable steering and snap oversteer,
do i undo it to what it says in the book or is there a stiffer spring,
thanks