Template:Exchanging Rails
Using an Activation Module it is possible to replace or reorient rails. This is often used to switch the direction of rails, and for advanced manipulation of docked entities.
To exchange rails, place an Activation Module and link it to all rails you want to change. Place any rail with the type and orientation you want to change the other rails to adjacent to the Activation Module. When the Activation Module is activated, the rails it links to are replaced with copies of the rail adjacent to the Activation Module. To ensure this works correctly, only one rail block should be adjacent to the Activation Module.
This also works when using Button, Inner Ship Remote, and Wireless Logic Module in place of an Activation Module.
Rail Turret Axis can not be modified this way.