works because it locates the regulator and the door handle door pull cup to the door independently though they are installed at the same time if the rail was located datumed by the door bracket the rail could not be held in position to a tight enough tolerance to maintain function throughout the entire range of door build variation by allowing the regulator to be located datumed by the door the traditional tolerancing stack up is maintained fig1 shows a window lift system 10 with spring loaded conduits while fig2 10 illustrate exemplary embodiments of the present invention as shown a window lift system 12 is provided wherein a pair of guide rails 14 are secured to a door bracket 16 as discussed above the mounting of the guide rails to the bracket is configured to provide limited rotational movement and stability to an interface between the guide rails and the door bracket with good stability fore aft up down and inboard outboard thus limited movement of the guide rails in the direction of arrows 18 is provided for assisting in the mounting of the lift system as it is inserted into an opening 20 in the door inner 22 so the guide rail or rails can be located or datumed to the door inner such limited movement allows for variances or door inner manufacturing tolerances as illustrated exemplary embodiments allow the window lift system or window regulator to be.