With Action Groups, is it possible to swap between different sets of engines? So that I might have rear thrusters (main) and vertical thrusters that can be toggled separately and repeatedly. Similar to the USCSS Nostromo towing vessel from the 1979 film 'Alien' and that one KSP Nostromo mod, if you're familiar with either. http://alienanthology.wikia.com/wiki/File:Nostromo_Landing.jpg