hi, friends! Purchased the BenQ projector W1008ST. There is a problem: can't set focus to either the top of the screen is blurred, or bottom. Blur good - the text is impossible to read. How to deal with this problem? accurate focus across the screen no. To admit, disappointed. Circles of dust on the chip too, but not too worried. Perhaps there is some more fine adjustment to align the image as it should? Fear and plead, and then never get back together. Who was faced with the problem of focus?