Could someone explain the rules for running balsa grain on a tapered wing sheeting. Are there advantages or disadvantages to running the grain parallel to the wing taper vs parallel to the spar? My wing has two different taper angles on the leading edge and a third on the trailing edge. The sheeting goes over the leading and trailing edge for a good glue joint. One advantage to running the grain parallel to the spar, on a one piece wing, is center section strength because of the continuous balsa run. Any thoughts?