hi, i have a 2007 prowler. i used it mainly in and out of camp and the trail is rough. my suspension is set very stiff and i'm looking to adjust it down some. i see the adjustment rings and i'm trying to find out if i need to take the tension off the springs before i try to turn the adjustment disk. is there a special tool to turn it or do i use pipe wrench or something similar? any help would be much appreciated guys!