don't try this at home if you don't have the tools!

i thought i could do mine: ground control coilovers and KYB AGX struts but found out (luckily without seriously hurting myself) that to do suspension work you really need air tools. My car was only 2 years old but the bolts holding the struts to the control arms were so tight i was afraid either my 5/8 ths wrench would explode or would slip. even after lots of liquid wrench, with the pressure that i was applying that would have caused major damage to whatever stopped the slip.
took my car to the shop and was charged $350. nice thing is that after about 3 months the front end started squeaking and they lubed it up for free. offered to do some grinding on the spring seats if that didn't work but it did the trick. now my back is doing the same thing. should have no problem getting them to fix it.

also, spring compressors can be scary things to use when you have before. they tend to slip a little when unbolting the strut. be careful and get help from someone who's done it before if you can.