FYI tried fitting these, now I'm not sure if I already had a damaged or weakened pin but I fitted them and the first time I put the boot down the force of the spring being compressed bent one pin that the strut attaches to on the boot lid, great... This caused a huge gap to form between boot lid and rear quarter... Yes the boot pop worked very well and was pretty impressed in all honesty, but I didn't want to see it rip the pin off so removed quickly and managed to bend the pin back in line.
In the essence of being impartial, I have always had a weak opening boot so can't be sure if one side had a faulty strut and/or pin that made it perform this way. The theory is spot on, and the trail run I did was impressive. So food for thought. Cheers
