It's not a major point but I would like to point out that the oil vent line should probably not be longer than 2 inches. The reason being that the crankcase "breathes" with the up and down motion of the piston. If too much tubing is used the accumulated oil will be sucked back in. On my Saito's I have found that a long line causes the oil to exit the front of the engine and is sprayed back over the cowl and or engine by the prop. For that reason I have decided to just let it drip below the engine and clean it off the bottom of the plane.