Hey there! I'm planning to put on an exhibition which contains transparencies printed up big (on back-lit film) and presented on lightboxes. Does anyone know the best and cheapest way to build these as buying them is REALLY expensive. They need to be a decent quality as they are for my final assessment for my degree. They'll need to be on for the best part of 14 days too. Has anyone made them before? I'm thinking boxes of about A2 size.