From publisher blurb: StarCluster 4 Toolbox 4 is a tool designed to let you create and control every system and subsystem of the starships and stations for your StarCluster 4 Game. Unlike Toolbox 3, Toolbox 4 is math heavy and incredibly detailed, but you can do whatever you want, at the price of detailed calculations. You can create: Tech Level 7, 8, 9 and 10 ships - not just TL 10 Arbitrary sized ships - not limited to certain hull sizes Armed military ships - not limited to just unarmed civilian ships Matter-Antimatter Drives - for enormous power Atomic space drives like Orion and Nerva types