I'm istalling moulding under a stairway that is a right (90 deg,)angle bottom left, 48 deg. inside top angle and 42 deg. inside (right side) angle. Is it possible to cut the top and roght side angles on a mitre saw or must I overlap the mouldings at the top and bottom, mark the tops and bottoms of the overlaps and use a hand saw the cut the mouldings? I'm not a carpenter and my goemetry is a little rusty.