I always put them on parallel to the fuselage with the last 2 crossing to help hold the others in place. If you install them only in a crossed fashion they will not hold the wing in place as well. Put 2 on parallel to the fuselage and lift 1 wing tip. The wing will move away from the fuselage some. Now take them off and put 2 crossed ones on. Lift by a wingtip and it will go to the point it will almost comes off.