A power tool assembly comprising: a drop arm assembly movable along a drop path between a first drop arm assembly position whereat a portion of a shaping device supported by the drop arm assembly extends above a workpiece support surface and a second drop arm assembly position whereat the portion of the shaping device does not extend above the workpiece support surface, the drop arm assembly including a capacitive coupling plate bracket formed from a non-conductive material and connected to a drop arm frame, the drop arm frame including a plurality of wells defined therein, the capacitive coupling plate bracket including a plurality of protuberances extending away from a fist side of the capacitive coupling plate bracket, a capacitive coupling plate mounted to the capacitive coupling plate bracket; an actuating device (310, 312) configured to transfer a force to the drop arm assembly when the drop arm assembly is at the first drop arm assembly position; and a control system operably connected to the capacitive coupling plate and configured to control the actuating device (310, 312) to transfer the force to the drop arm assembly when an unsafe condition is sensed and characterised in that the capacitive coupling plate bracket includes a raised lip extending at least partially about a perimeter of the capacitive coupling plate bracket and extending away from a second side of the capacitive coupling plate bracket, the raised lip having a first height, wherein each of the protuberances is associated with a respective one of the plurality of wells, and wherein each of the plurality of protuberances is threadedly engaged within the respective one of the plurality of wells by a respective set screw, wherein the capacitive coupling plate is mounted to the second side of the capacitive coupling plate bracket which is opposite to the first side of the capacitive coupling plate bracket, wherein the capacitive coupling plate has a second height, and wherein the first height of the raised lip is greater than the second height. a drop arm assembly movable along a drop path between a first drop arm assembly position whereat a portion of a shaping device supported by the drop arm assembly extends above a workpiece support surface and a second drop arm assembly position whereat the portion of the shaping device does not extend above the workpiece support surface, the drop arm assembly including a capacitive coupling plate bracket formed from a non-conductive material and connected to a drop arm frame, the drop arm frame including a plurality of wells defined therein, the capacitive coupling plate bracket including a plurality of protuberances extending away from a fist side of the capacitive coupling plate bracket, a capacitive coupling plate mounted to the capacitive coupling plate bracket; an actuating device (310, 312) configured to transfer a force to the drop arm assembly when the drop arm assembly is at the first drop arm assembly position; and a control system operably connected to the capacitive coupling plate and configured to control the actuating device (310, 312) to transfer the force to the drop arm assembly when an unsafe condition is sensed and characterised in that the capacitive coupling plate bracket includes a raised lip extending at least partially about a perimeter of the capacitive coupling plate bracket and extending away from a second side of the capacitive coupling plate bracket, the raised lip having a first height, wherein each of the protuberances is associated with a respective one of the plurality of wells, and wherein each of the plurality of protuberances is threadedly engaged within the respective one of the plurality of wells by a respective set screw, wherein the capacitive coupling plate is mounted to the second side of the capacitive coupling plate bracket which is opposite to the first side of the capacitive coupling plate bracket, wherein the capacitive coupling plate has a second height, and wherein the first height of the raised lip is greater than the second height. a raised lip extending at least partially about a perimeter of the capacitive coupling plate bracket and extending away from a second side of the capacitive coupling plate bracket, the raised lip having a first height, wherein each of the protuberances is associated with a respective one of the plurality of wells, and wherein each of the plurality of protuberances is threadedly engaged within the respective one of the plurality of wells by a respective set screw, wherein the capacitive coupling plate is mounted to the second side of the capacitive coupling plate bracket which is opposite to the first side of the capacitive coupling plate bracket, wherein the capacitive coupling plate has a second height, and wherein the first height of the raised lip is greater than the second height.