Removing the old end cap and track assembly was easy. All you need is a 1/4 inch nut driver. Removing the humidity control assembly was another matter. It is fastened to the end cap by plastic clips. To remove it, you need to disengage the clips, starting from the rear of the humidity control assembly. When you work your way to the front, you need to lift the assembly and twist it over the slide assembly in order to disengage it. (The person who designed this is still laughing.) To apply the humidity control assembly to the new end cap, you do these steps in reverse order. Once this is done, attaching the new end cap to the refrigerator is simple. The entire project should take about five minutes, once you figure out how to get the humidity control assembly disengaged.