The design of this device and receive the dissolution of the long boards alone I suggested to an experienced cabinetmaker. Before you cut from boards (chipboard, plywood) equity bar, it is necessary to first make a simple device: a couple of small wedges to connect a thin nail with a gap between them equal to the thickness of the Board. Having washed down, insert the jumper and nail to continue to cut, as needed moving closer to the hacksaw and the device. Now the canvas of the tool is not jammed, and the plank will be bent and the end of the operation will not happen its an unfortunate cleavage (cleavage) from the Board.
A. RODIN