Hi I have a 2.7m wide manual pulldown screen mounted in place. Its not perfectly flat, there are ripples across a large part of it. There are a few pics here: http://www.moley.org.uk/screen/ Is this bad ripple or is this to be expected with a manual pulldown screen? (its actually a 4:3 so will go down a fair bit further than shown in the picture) Is there anything I can do to tension it? Cheers Mamo.