At one end of the layout my Free-mo module is connected as part of an industrial park.   In order to work this area, the switcher needed a small tail track.   However, I didn't want this extending into the main part of the room where the kids play, and eventually something (or someone) whacking into it.   So I built a small drop down leaf and mounted it with a hinge.    In the "up" position, a simple bolt/washer/nut combination keeps it in place.   I need to get a small hook and eyelet to hold it back in the down position.