I just did the eibach springs with the autozone spring compressors they rent. I got two pair. Needed 3 for the stock springs and all 4 on the Eibach's. You're gonna need an air 1/2" impact for sure. It put my snapon one through some pretty good work. Impact makes taking off the sway bar/tie rod/upper control arm nuts easy though as they should be somewhat seated in the part. Make sure you mark your center line on the shock and the spring cap and get them back together lined up or you won't get it back in and will have to start over with the compressors. Also, put the compressors on so the nut you have to wrench on is toward the shock end, not the spring cap end. I had one on backwards and when I went to let them all off it was a pain in the ass to get a socket on it. If you have a good air impact, it really wasn't too bad. I watched a youtube video and did it all myself in the garage in about 3hrs total. Oh, I also sprayed some PB Blaster on all the nuts the night before. Not sure if it needed it, but certainly didn't hurt. Be careful as you work those compressors, little at a time working your way around the spring both compressing and letting them go.