A arched back cat was what my wife wanted me to make.
I made for 0% infill and my new vapor treatment to make a glossy cat
which I will spray paint glossy black.
note the 0% infill, 3 shells .27 was ok but needed some follow up
fill in of gaps (see the pics)
If you are adverse to clean-up, you might want to use infill.
I prefer saving lots of plastic and time.
will need clean-up (see my results)
or use some infill