A molding device is provided that includes outer and inner rubber molds that define a space therebetween for forming a column. The retainer is independently interlockable with the reed cage. In another embodiment, a perforated seam is positioned along the longitudinal axis of the blanket between the patient’s neck and the access opening. The position of the target volume relative to the radiation beam is determined and a collimator between the LINAC source and the volume of interest and target volume is controlled to maintain the radiation beam on the target volume and away from any OAR based on the determined position of the target volume. Subsequently, it is determined if conditions for clearing a scenario, for which the game development processing is executed, defined in the scenario in advance are met. The PRGs make use of a flexible rack and pinion design to convert the relative tree motion into torque and achieves the requisite RPM by cascading a sequence of large-small gear pairs, one such pair in each PRG utilizing a one-way clutch torque converter, ultimately meshing with a small gear on the generator shaft.