Hello, I've measured the resultant screen size on my wall from my Optima H30 projector. Dimensions are W x H :225 x 125cm or 88.5 x 49 inches. From the ceiling, the picture starts around 33cm/9in down. I've seen an electric model LD2420W at http://www.av4business.co.uk/screens/html/electric.htm I'm assuming that the quoted dimensions 230x129.5 cm are the visible screen size and that with the black borders, the screen is actually slightly wider and longer. Is that a correct assumption with most 16:9 screens? Are there any other (dimension) caveats I need to be aware of when buying a screen? I'd prefer electric to roll up each night, otherwise young kids would find the hanging screen an ideal swing in the daytime.. Finally, do you have recommendations as to where to buy from? Thanks, Al.