I have two "problems" with this set, both minor. Is it possible to tweak the picture rotation on this set, since my picture slopes slightly upward from left to right (i.e. the right hand side of image is about 1cm higher than the left, more noticeable halfway up the screen, when you see a line of text for exampe). Also, the extreme right hand side of the screen, when the image is bright white, looks slightly yellowy, like a nicotine stained "fringing". Can this be corrected with manual convergence through the service menus too? Many many thanks in advance.