The chain saw handle apparatus provides for removable attachment to a chain saw handle wherein the elongate arm of the apparatus is disposed above or lateral to the center of gravity of the chain saw and the lower section of the apparatus attached medially to the chain saw handle. The pipette nozzle includes a body defining a passage therethrough and having at least two seating surfaces provided on the body. In a sub cooling jacket portion, an exhaust-side upper space is provided at a level above the exhaust-side lower space. The foamed body his made of cold urethane foam. Based on this model, conditions are presented under which a one-wafer cyclic schedule with lower bound of cycle time can be found.