I am looking at this pretty chart: http://upload.wikimedia.org/wikipedia/commons/8/80/Isotopes_and_half-life.svg My question is, how sensitive is it to the variation of SM parameters? Imagine that I am sitting in front of some magic TV, where the image above is displayed. Below there are sliders, one per SM parameter. I start to move these sliders, looking at the screen. So how sensitive is function of nuclear stability to the small variation of parameters, how much do I need to change to start seeing any difference or to completely change they way how it looks? Of course there are no exact answers, but any rough estimations - like 1%, 0.01%, or 0.00000001%?