Have we ever resolved that control tower problem? If not, I suggest we make something like this one:

Remember how we had the lobby at the base of the last one? Well in this one, it will be on one of the levels at the top. The building itself is mostly square and we can copy the slanted window top from the current tower to the top of this one. Stairs can be built in the interior going to the top to make it more realistic and eliminate teleporter problems.