PanzerSD, Why must you remove the sub-frame?

If you were to drop the sub-frame/raise the car the springs would come loose as a result. But I wonder if they might go flying and do bad things on the way!?!?! You'd have to make sure the drop went straight without going off to a side or front/rear.

I wonder if installing the springs without a compressor would be a nightmare to figure out.

I replaced the springs on the 115, rear end in the car. Wasn't too bad of a job with the compressor. I did learn, however, the importance of gripping the spring on one side (towards the front of the car), and letting it curl under compression.

Attempting to compress the spring evenly, by placing the compressor (generic tool) end pieces in the center of the coils, resulted in the spring popping loose from the compressor as the coils shifted. And that resulted in one badly damaged finger nail! Grew back just fine . . .