thanks for this guide, it helped me replace my snapped spring today!
my bit of feedback will be about the 21mm bolts holding the strut to the lower arm
1) when you hammer out the 21mm bolts (because they are splined) it is best practice to leave the nut just on the end of the bolt to hit the hammer against. If you hit a hammer directly onto the bolt you will most likely damage/bend the threads and have trouble when re-assembling! Older cars will suffer more for this as the bolt become more seized.
2) you can use a jack to take the strain of the lower arm (+ drive shaft, hub, disc brake and caliper). This helps to take some of the strain out the 21mm bolts when removing, and especially helpful when trying to get everything lined back up when putting it all back together!