blind hole 41 is a threaded blind hole matched to the outside diameter of the right hydrofoil ball nose spring plunger 20 and of slightly longer length to allow for screwing in the spring plunger without bottoming out plane magic attaches to any standard size pool pole by use of hydrodynamic force it amplifies down force to whatever is attached to the pole typically a pool brush once attached the brush will be used in similar fashion to any pool brush 1 attach plane magic to the pole 2 set the planes to u2212 15 degrees for scrubbing the side of the pool see fig9 detail a and fig1 the hydrofoil angle is set by firmly grasping the hydrofoil and twisting it to the desired position by applying sufficient force the ball nose spring plunger is made to retract from its present position and will re engage in the new position 3 step to the edge of the pool 4 position the brush against the side of the pool so the planes are just below the water surface 5 give the pole a firm steady downward thrust u2014 one hand is all that is necessary as soon as the foil achieves relative motion through the water lift in the direction of the brush causes the brush to press firmly against the side of the pool 6 at the end of the stroke turn the wrist one quarter turn and begin to withdraw the brush upward for a right handed person this would be a one quarter turn to the left 7 a foot or two before the planes reach the water surface give a one quarter turn to the right and gently maneuver the pole.