Print upside-down, as shown on the bed of the Ultimaker. There are some overhangs that causes a bit of drooping in my print, but nothing too terrible. I had quite a bit of stringing, which I cleaned up using a hobby knife in about 15 minutes. This makes a nice model for engineers or designers working on stents or endovascular aneurysm repair devices. A print like this can be used for a mold to create a bench-top deployment or flow model. This one is printed in PLA, but as a mold core, this would be a good candidate for trying water soluble PVA.