the horizontal width of surfaces 14 15 16 20 21 and 22 each equal distance lx as found in fig1 the horizontal depth of surfaces 14 17 20 16 19 and 22 each equal distance sx found in fig1 surface 1 is the naturally round front of the log surface 3 is the naturally round rear surface of the log surface 4 is the flat bottom surface of the log surface 18 is the bottom surface of the center notch and has zero degrees of tilt in relation to the length or radius of the log surfaces 17 and 19 both run at an upward angle from surface 18 in relation to the radius of the log in opposite directions until each of the surfaces reaches the outside edge of the log and both have no tilt in relation to the length of the log both surfaces 15 and 21 have no tilt in relation to the radius of the log and both angle downward from surface 18 in opposite directions until each surface meets surface 4 on their side of the notch surface 14 being on a plane with compound angles has the same downward angle from surface 17 as surface 15 does from surface 18 in relation to the length of the log and the same upward angle from surface 15 as surface 17 does from surface 18 in relation to the radius of the log surface 16 being on a plane with a compound angle has the same upward angle from surface 15 as surface 19 does from surface 18 in relation to the radius of the log and the same downward angle from surface 19 as surface 15 does from surface 18 in relation to the length of the log surface 20.