I have in the past when I was in a hurry & didn't want to crank a spring compressor all the way down put the compressor inside the spring then used a shop press(20 Tom in my case, but a 12 would work too), pressed down on the spring then snugged up the spring compressor to hold it compressed, release the preasure on the press, and Wallla, compressed spring put it in the car, put weight on the wheels, loosen compressor the rest of the way, unhook & pull up through the top...