Further explorations in the orthogonal but not square school of dungeon-building.
Also, not recommended for practitioners of the “I’ll describe it in words and then you try to draw it” method.
Like some other people have said about their process, I generally draw these as straight to ink, without penciling anything in (not always, but often). I also have frequently been laying out a guide grid that divides my page into a few sections. You can see the effect of that on this complex in the two column sections (H, G2, G1, K on the left and S1, S2, S3 on the right). Having some organization in place helps keep these from becoming too scattered, and gives me something more to think about than merely a blank sheet of paper, which can always be a daunting thing to work from.
As usual, feel free to use for any non-commercial purpose, or contact me if you’d like to use this on a commercial project.