A new video from General Motors gives us an insight on how its engineers test the durability of the 2011 Chevrolet Camaro Convertible’s soft-top. The company said that during the development phase, the electrically operated tops of the prototype models were opened and closed more than 22,500 times, which is claimed to be three times more than what an average driver would do in 10 years of use. GM added that some of those tests were performed in extreme weather conditions with temperatures ranging from minus-22° F to 170° F and humidity of up to 95 percent. Read more »