The action will first pause at the Grey Mixer step to let you adjust the conversion. Then it will pause at the High Pass step to allow you to set the High Pass effect -- you'll want to increase the "Size" setting until you just begin to see some light areas, but not too much: Then the action will pause at the final Threshold step where you can refine the amount of detail in the line work.
You'll wind up with several layers organized into groups: Continued in next message...