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Once you pull the string and open it, it will close just fine, just as if you didn't have an electric at all. It will be able to manually open and close as many times as you want, until you push that emergency thing at the top of the string back up to engage the chain. The noise thing depends. If the rollers and track are old and not lubed and banged up then probably noisy. Mine are almost three years old and in good shape and I could open and close mine without too much noise. Just do it s l o w l y... Also, don't forget that when you close it from the outside, don't put your fingers in the seams, otherwise you will crush your fingers and wake everyone up with your darned screaming waaaaaa!
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