partial perspective view of a second embodiment of a channelizer drum reformer 400 power assist valve system 405 it is the function of the power assist valve system 405 to provide a simple means by which to actuate pneumatic cylinder 401 downward force applied on channelizer drum 200 is transmitted to the rigid reforming assembly 128 if when the force is substantial enough elastic cords 109 and 120 extend and cam arm assemblies 129 are urged outward and at some point contact the interior of channelizer drum 200 this downward force on channelizer drum 200 is eventually transmitted to the central mast assembly 127 component central mast 101 adjustable angle adapter tube 420 is mounted rigidly to pivot mount assembly 130 by fasteners inserted through holes 421 and 422 compression spring 415 is contained in spring cup 406 at one end and contact tube 418 at the opposing end spring cup 406 and valve 416 are secured to pivot plate 407 pivot plates 407 408 409 and 410 rotate about fasteners 411 412 413 and 414 urging central mast 101 and adjustable angle adapter tube 420 to maintain a generally parallel orientation depression of the button 417 allows flow of compressed air from supply hose 419 to pneumatic cylinder 401 when the power assist valve system 405 is in equilibrium valve 416 is not actuated and button 417 rests against contact tube 418 downward applied force on channelizer drum 200 is eventually transmitted to compression spring 415 if the applied forces become great enough compression spring 415 deflects and button 417 is depressed enabling flow of compressed air from supply hose 419 to pneumatic cylinder 401 urging it to extend the extension of.