removing the bolts are not only dangerous and tedious to get back in under the pressure of the spring you have also removed the alignment of the car. now you spend a 180$ to get it properly aligned when you could have spent that on a proper spring compressor and done the job in less time safely.
i have doen this both ways and would never try it again without the compressor. 30 min each side with it and no worrys about getting hurt