I am getting to the point where I need to close in my access hatch. I have an idea on how I will make it lift straight up. Once my scenery is done I do not see me having to use the hatch often, as there are no switches out of reach from the outside of the layout.
So post some photos and diagrams on how yours are done, are they hinged, just left open, made to look like something else. Mine will have a small pond in the middle.