unaddressed, can result in runaways. The use of block and tackle or capstan winch is common to handle line sets that have significantly unbalanced loads. Block and tackle sets use the mechanical advantage (e.g., 6 : 1) of multi-purchase blocks to enable a crew to manually raise an imbalanced line set. The standing block is secured at the grid level and the running block to the batten or arbor (whichever is overloaded). Where an engaging bar has been designed into the stage level locking rail, a portable electric capstan winch may be used to counteract an imbalanced counterweight line set. Pulling on (constricting) a rope wrapped a few times around the capstan, a drum spinning at a constant rate, generates enough traction (through friction) to tug the imbalanced load. Especially tall fly towers pose a balance problem for standard counterweight line sets. As a line set is lowered to the stage, the weight of the lift lines is added to the total weight of the line set that a rigger must be able to control. For example, a batten with 6 lift lines of ¼" aircraft cable that travels 50 feet effectively weighs about 40 pounds more when flown in than when it is flown out. To address this issue, a compensating mechanism may be added to the counterweight system. Either chain or thick wire-rope may be used. One end of a compensating chain (typically roller chain) is suspended from the underside of the counterweight arbor, the opposite end mounted to the adjacent wall, at a point corresponding to half the travel of the arbor. The compensating chain is about half the length that the arbor travels, and sized to weigh twice as much as the combined weight of the lift lines per linear foot. At arbor low trim, the compensating chain is fully supported by the wall. At arbor high trim, the chain is fully supported by the arbor. Paying out at half the speed of arbor travel, a compensating chain effectively eliminates imbalance along the full path of travel. A compensating wire rope line is attached to the top and to the underside of an arbor and runs through sheaves near those for the operating line. This wire rope line follows a similar path to the operating line. The compensating line is made of two lengths of wire rope: a thick heavy wire rope (e.g. 1" diameter), and