We use a little less force: 120gf (setting 12), and generally use 20cm/s, but 30 is fine, too, if it gives you the cuts you're looking for.

Also, we use quality 2, but we've just never changed it from where it was set originally because we've gotten great results so far and can cut TINY little details.
We have a CE5000-60 24" plotter, but everything should translate to the CE5000-40 CR Pro.
