Maybe I'm just confused, but I've had 4 sets of
control arms and at least as many sets of springs, including stock springs and all I've ever done is jack the car up by the center of the rear, take the wheels off, take the lower shock bolts out, put jack stands under the back end of the subs, let the jack down to a safe point in the rubber center
brake hose, put some weight on disc/drum on each side separately, pull out the spring. I assure you, not once did I ever take the control arm bolt out with the spring in.