The fusion rate in the core is inside a self-correcting equilibrium: a rather increased amount of fusion would bring about the Main to heat up extra and extend a little bit versus the weight in the outer layers, lowering the density and consequently the fusion charge and correcting the perturbation; http://digitaledemonen.nl/de-ultieme-gids-voor-het-kiezen-van-de-juiste-opstalverzekering-voor-uw-eigendom/