I have made this in VAB. And since .23.5, I am able to make 400 parts ships with little drops in FPS. It weighs somewhere around 200 or more tons. It is going to be assembled in orbit. I am running, Novapunch, KW, and kerbal engineer. I modified the Nuclear engine .cfg to not use oxidizer. So it saves weight and is more true to and real nuke engine. Tell me what you think! Thanks to hack gravity I was able to float and capture the images. I think you are able to see it better with it in the air rather on the launch pad