The rudder and vertical fin can now be marked to cut the hinge lines and fusebox cutout. There is a dimensioned drawing in the build CD that shows the locations for these lines. I tape the marked fin back into the shuck and then run it through my hobby band saw. These surfaces can be lightly block sanded and capped with the 3/8" balsa pieces.

A note about the trailing edge of the vertical fin: This piece extends down well below the vertical fin and will mate with the end of the fusebox. Take a moment to make sure the alignment of this piece is correct so that it will mate up with the fusebox properly at a later time.