Saragosa. If you look at the friction stays (hinges) open tem through the full range of movement you will notice a small brass slot headed screw which may be obscured at some point in the opening range by the hinge sliding arms. They are normally located in the black plastic slider. Tighten them up clockwise to increase the friction on the hinge. This will solve your problem. Kev at KL Plastics
Kev, October 2010
