Repeat step 1 except use the dorsal petal cutter. This is the cutter that has a notch in the middle as shown.
Place the petal on a petal foam pad and thin the edges of the petal using a ball too
Place the petal on the Cymbidium dorsal petal veiner and press using even pressure
Return the petal on the foam pad and use a dresden tool to draw a line on the center of the flower.