This here is a fairly interesting craft, both for its design, and the backstory. The KH-260 was sort of the "failed design proposal" for my superlarge double-decker A380 analogue, what is now the KH-250.

Looking at the screenshots, we can see that I left it in a mid-development state. Note things such as my testing of new mechanical landing gear, the mid-XML painting, and the lack of small features, such as proper engines and lights.

Even though its size is roughly similar to the KH-250, this was designed before the 1.7 update that allowed fuselage dimensions up to 10 units, so the quadrants of this craft are actually old fuselages scaled up to size. This, however, left moderate problems with the weight, fuel capacity, as well as the more serious problems with glitchy attachment points. everytime I added a new section, or mirrored the plane, the mirrored side wouldn't attach to the original, or to itself (the individual parts became detached). This, along with the other major advances being so difficult, slowed design critically, to the point that I abandoned it to collect virtual dust.