Labsis stage is an ultra thin apse for temporary ceremonies. The structure is an elastic geodesic gridshell from hand bent GFRP planks, with neither cutouts nor waste, and fully reusable. The straigt and flat planks were numerically bored, assembled in a grid lying at the ground,and then fully deployed by elastic means without scaffolding. The grid is then braced with a diagonal and covered with a smooth unpatterned membrane. The structure is made with 164 meters of 5mm thick planks, and weighs 170 kg. The stage was commissioned for the Lapsus festival of avant garde electronic music held in Barcelona Contemporary Culture Centre (CCCB).