Printed half-size with PLA. It doesn't scale down well and the PLA tended to split on the layer boundaries because it was so thin. Even so, I was able to build my prototype cat litter dispenser. The bad news is that the 9g servo I used was insufficient to turn the fan against the weight of the cat litter. I'm going to re-design around a auger to get more mechanical advantage.
Sliced with Slic3r and printed at 180 with a heated bed on glass with hairspray.