The left front side window of my 73 Imperial 4dr ht (with the optional vent windows) has to come out so I gain access to the side mirror. The FSM does give advise to get the glass out with the vent window and most of the tracks, but I only have to take the side glass off of the door. The glass is attached to the lifting track with a few screws and plastic, plug-like components, of which the latter keep spinning around without holding them still with a tool such as pliers, but there´s no slots in them to get a good grip. Does somebody have tips to get only the side window out? PS. The mirror itself is loosely attached to the base, which will be retightened.