My Rev. C hinge is fine so far. The Rev A I rented for a week before I bought this one was looser, but still fully adjustable, just took a little more work. When you shave so much weight, something is going to have to give. It is a very delicate balance. I put a Speck plastic cover on my new one, it added enormously to the weight of the screen, and in the long run would probably cause premature hinge wear. I don't think I'll use it. Fortunately I bought it for 14 dollars.