Place the obelisk controller like this on the Obelisk in your map:
Goto the properties of the obelisk controller and substract 41 from the Z value, enter the new value in the Z box and press OK.
In this example:
Old Value = 28.009
Substract - 41.000
New Value = 12.991
The controller will jump underneith the map, this is fine, and supposed to happen.
Now when you play your map the obelisk will fire from the red top.