Alright, as promissed I have here a preview of the map I'm drawing. Note that I haven't nearly drawn all the rooms yet, this is just an early preview.
I think I'll make two different versions when I'm done, one with points of what's what, and which of the three paths goes where. And one vanilla map with just the layout.
I'll also later add some visual changes to you can see which the rooms are which you see in game, and which passages are just to connect the different rooms, which you don't actually see ingame.