Here's my space station.. Consists of main command module with 2 nuclear engines, plus 2 smaller for when (if) the nuclear ever run out. I can't detach them now for risk of damage to the rest of the station. There's 4 available docking ports around bottom of the command module for tugs/fuel loads.. I have two fuel loads in the picture as so far I haven't had to launch a tug for rendezvous. Third section is a fuel/resource section within an enclosed fairing. Docking gantry beneath that for interplanetary ships for refueling, then the massive solar arrays that need to come off.. Or be rearranged. I haven't decided yet.