Evolution of the surface luminosity, radius, and temperature of our models. D6 observations are plotted here for the radius. While the radii of D6-1 and D6-3 are similar to those of D6-2, their age estimate is less certain and spans a bigger region. They are not plotted here so as to not overcrowd the diagram. The radius bump at 10² yr for the 1.1 M_⊙ is due to a lowering of the extra surface pressure (applied to the early evolution for numerical convergence), and is non-physical. The T_eff drop corresponds to this.