A method of forming an electrically conducting feedthrough. The backlight module comprises a backplate and a light guide plate. Another improvement is that the housing of the dispenser in this case is raised as the user pulls down the film to be adhered, and it is the weight of the dispenser that causes the unit to reset for the next use, thereby eliminating the need for springs, at least for this purpose. The hermetically sealed electronics compartment secures a processor and a location sensing system, which communicates with the processor while interacting exclusively with features of the well casing to determine the location of the housing within the well casing.