I have a Cannondale Prophet that I want to remove the rear shock from. There is a bolt at each end of the shock that runs through a frame mount, through a bushing, through the shock mount, through another bushing, through the second frame mount, and then a screw is threaded inside the end to hold it in place. The bolt has seized to the inside of the bushings and I can't get it loose. I've got some penetrating oil on it right now hoping that will break it loose. Has anyone used heat to free up a bolt like this? Any ideas would be apprciated.