Guys, you know I was talking about if we have to evacuate Cythera. If they need to evacuate, and they need to evacuate FAST like something will blow up the planet, an ion engine would take years to get up to speed. So, this could be used for the plot. (Note: I know this probably wont work, but they realy only need one station and its not like they cant fly off on there own after the beam is cut.)