I was going to switch out my stock mirrors (with extenders) and put my bar ends back on, and the bolt was so frozen that I ended up stripping the hex head. Speedy's solution is to drill through the extender and the bolt with a 1/4 bit and use the bit as a lever to remove the bolt. Any other suggestions? And no, I did not use any locktite. Guess I don't know my own strength.