Surface deformation of the twin binary system of our 0.2 M_⊙ stars with a separation of 2.8 R_1D (corresponding to a period of 2 h and 11 min) as viewed from the side of the system. The black curve corresponds to the Roche lobe of the system, the yellow curve is the surface of each star given by the Roche model while the purple curve corresponds to the surface of each star given by the modelling with MoBiDICT. In this particular case, the filling of the Roche lobes is of 81.7% with each model.