A workhead assembly for use in rail applications, comprising: a frame having a front sub-frame portion on a first side of the frame and a back sub-frame portion on a second, opposed side of the frame; a first and a second pair of tamping tools (320, 321, 322, 323), each pair being disposed on said opposing sides of the frame; a first and a second pair of hydraulic actuators (330, 331), each pair of hydraulic actuators (330, 331) being disposed on said opposing sides of the frame; each tamping tool of said first pair of tamping tools (320, 321) coupled to a tamping arm (340, 341) pivoting around a respective pivot point (312, 313) on the front sub-frame portion, which tamping arm is, in turn, coupled to a hydraulic actuator of said first pair of hydraulic actuators (330, 331) coupled to the front sub-frame portion; each tamping tool of said second pair of tamping tools (322, 323) coupled to a tamping arm pivoting around a respective pivot point on the back subframe portion, which tamping arm is, in turn, coupled to a hydraulic actuator of said second pair of hydraulic actuators coupled to the back sub-frame portion; wherein the first and second pair of hydraulic actuators (330, 331) are configured to be actuated to increase in length to thereby impart movement to the respective first and second pair of tamping arms (340, 341) to impart movement to the respective first and second pair of tamping tools (320, 321, 322, 323), characterized in that an additional hydraulic actuator (360, 361) is associated with each tamping tool (320, 321, 322, 323) and configured to permit independent movement of the tamping tools. a frame having a front sub-frame portion on a first side of the frame and a back sub-frame portion on a second, opposed side of the frame; a first and a second pair of tamping tools (320, 321, 322, 323), each pair being disposed on said opposing sides of the frame; a first and a second pair of hydraulic actuators (330, 331), each pair of hydraulic actuators (330, 331) being disposed on said opposing sides of the frame; each tamping tool of said first pair of tamping tools (320, 321) coupled to a tamping arm (340, 341) pivoting around a respective pivot point (312, 313) on the front sub-frame portion, which tamping arm is, in turn, coupled to a hydraulic actuator of said first pair of hydraulic actuators (330, 331) coupled to the front sub-frame portion; each tamping tool of said second pair of tamping tools (322, 323) coupled to a tamping arm pivoting around a respective pivot point on the back subframe portion, which tamping arm is, in turn, coupled to a hydraulic actuator of said second pair of hydraulic actuators coupled to the back sub-frame portion; wherein the first and second pair of hydraulic actuators (330, 331) are configured to be actuated to increase in length to thereby impart movement to the respective first and second pair of tamping arms (340, 341) to impart movement to the respective first and second pair of tamping tools (320, 321, 322, 323), characterized in that an additional hydraulic actuator (360, 361) is associated with each tamping tool (320, 321, 322, 323) and configured to permit independent movement of the tamping tools.