HI, I have been reading the forums and someone posted this great link but I can't work out how to use it. I may just be being thick but its making my head hurt. http://panasonic.co.jp/pavc/global/projector/calc/html/aspct169/ax100.html Can someone please help? My PJ is 210cm from the wall and about 216cm off the floor. I think I need a 160 cm x 90 cm screen. Can anyone advise me please much appreciated.