Glue the pattern to the liquid paper.
Tape up the area with some extra wood to provide a more stable base. The tape protects the headstock and also matches the level of the taped up area with the height pattern and liquid paper.
Dremel with fine downcut router bit and aquarium air pump. I'd like a bit more air flow but it's enough.
A good light source and magnifying headset really helps with the routing. The result isn't perfect, but good enough.
Pattern peeled and liquid paper scraped.
cont.