I'm not entirely sure I remember the elevators in the Serpent Temple. I've been through a couple of elevator/teleport maze areas where I found the "flags" in the map kit to be very useful.I used RED for the entrance to the maze, BLUE for the middle part and GREEN to mark the exit.
I would write in comments as to which elevator went to which floor and the order to use them. It will help to show you which doors/elevators you have used or not.
It is a little difficult when the map will show different floors at the same time. (Stout Mines) 
Good luck !! 

I wanted to go back to a savegame and look and the Serpent Temple elevators and find the switch that you are talking about. No can do of course. 
Suffering from chronic CRS doesn't help me either.
)
OK...best shot.. If I am remembering the correct area, I marked one of the elevators as "this one not working". After I pulled the lever or pushed a button I later found the same elevator to be working and continued on with the maze....or finished it.......again CRS.
Best I can do. Maybe someone else???
