I have been looking at photos of the coupler shrouds of E units and wondering on how they worked. Did they slide open or hinged? I noticed on a E7 photo it appeared the coupler pocket and the strike plate was on a sliding mechanism and locked in place. Some photos appeared that they where removed permanently. I guess the engine shop got tired of hammering the dents and getting them to fit and close. I was also wondering on how the coupler lift bars worked in conjunction with the shroud doors?