On the strut hat theres 2 or 3 holes from memory. What ive done is put a screwdriver through one of the holes and lean the screw driver on to the ground so that when you try and turn the top nut, instead of the strut spinning freely the screwdriver will stop the strut from spinning because the screwdriver is hitting the ground.
Thats what i did when i could get mine off.
Hope that makes sense.