This is a space station core featureing a ladder from the lander can down the entire length of the station. (Lights and solar panels make it easy to see even on the dark side of the Mun!)
After modifying the standard station core to have tubes (structural fuselages found in structures) instead of open to space girders, I thought it would look like some place you could call home and take your helmet off. I installed lights and ladders so you could walk outside the entire length of the vessel without doing an EVA if you wanted to.
The known issue with the middle section of station lights being damaged by tank separations has been fixed… …also added additional backup solar panels on the second PPD-10 hitchhiker storage container. Just in case anyone trashes the main ones during docking maneuvers.