Make sure DU station is at set location

Question:
We probably want the DU station to be as fix/immovable as possible, so we can make sure that we can reach the same point every time and if we accidentally push it a little or press too hard to insert a SFP that it doesn't mess up with all the other positions by moving the entire frame. On the other hand: if the station is too fix, then we definitely risk breaking some stuff? Need to find a solution here and get on it.