Stuck Changing The Convertible Top Hydraulic Cylinder

[chikosneff]

Hi everybody! My hydraulic cylinder operating the convertible top on the driver side started leaking so I decided to replace it, easy job, I thought.
Now it's been days that I am stuck because I cannot unscrew the torx t40 screw that secures the rod of the cylinder to the top mechanism. I tried power tools, penetrating oil...NOTHING. That screws doesn't move! Am I missing something ? I have a 2000 GT convertible.
Thanks!

 

[Deek]

Have you tried a ratchet and a break bar? I dont know much about Convertible but a break bar or a hammer with the ratchet may help