I have made a foolish blunder, which might actually work out. You see when tiling the plans, I accidentally used a piece from the other wing, making the wing about 15cm longer. I didn't realise this until I have set one side of the wing, and flipped over the plans. It seemed quite large for 1.2 meters. I measured with a ruler, and this was way larger than 1.2. I think I might have a 1.5m wingspan kadet! We shall see how this goes I guess.