These drawings have been professionally printed using an A1 printer. These are the real deal and the amount of detail is excellent. Definitely a must if you are planning a project or need to see how everything fits together. This is the same type of drawing as a full duel seat trainer found at training bases with flight simulators that cost many hundreds of pounds. Offered here at an great reduction. Getting these printed at a printing works would cost significantly more than this! Note: I cannot assure you everything is at a precise smale of 1:1. All dimentions are within a 2cm contingency, although many are exact.