try tightening the 3 upper strut bolts (13mm) and repeating the process I described above. I find it hard to believe the control arm can be that tight.
You could also use one of those small hydraulic jacks and seat it on the control arm. Point the top end of the jack towards the sway bracket on the stut and use the hydraulic pressure to release the control arm. (I've never done this but it just popped in my head)