MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
Cool design, and all the holes line up and everything. I tried printing it with nylon just now and it's too loose, the phone wiggles a bit and can fall right out with no effort if you turn it upside-down. I imagine if it were PLA or ABS or another stiff material it would work fine, but nylon seemed like a great material to try. I am using Cura on an Ultimaker 2. I suppose just scaling it down a touch might work but it would probably be best if the mesh were changed to take advantage of nylon's increased flexibility, almost like the rubbery cases that you stretch over the phone a bit.
Nice work anyway!