Can these be done while the cars jacked up on 1 side? Had the car jacked up the other day to adjust the coilies and was going to do these but wanted to know: 1. Are either of them under tension, if i undo the bolts to change the bushes, their not going to ping out etc? 2. what are they like for changing? Ibe heared the steering rack's a t**t! Any help/thoughts!