I would tend to agree with the above statements. If you want to replace the bushings in the trailing arms then I would remove the whole axle. We made a jig to compress the rubber pieces so that the circlips would pop into place. You can't do this any other way.

I use a capenters square to set the axle up before I install it. Set the axle on a level place and use wood blocks or carboard to get eveything level. You can check this by placing a level on each axle tube and adjust until the whole unit is horizontal.
Adjust the locating pin that goes through the trunk floor until it is at 90 degrees and lock it into place. Failure to do this step will often result in a lot of rear tire wear. Then you can install the compensating spring which must be removed to do this job. Everything else is a matter of assembly.