I’m using Blender (2.73a) for Mac to design parts, and I’m changing the units and those are working. I’m able to print parts, and they’re dimensionally correct.
I do have an odd problem, though. Slic3r (and Mac OS X, for that matter), seem to both see the .STL files as empty. OS X will preview the file (as not having a part), and Slic3r will import it (no part, no layers).
If I open the file in Meshlab, and save it as an .STL, but I still get the same results. Cura can open and slice it just fine, and Simplify3D converts it to inches and it’s very, very small.
Is there something odd in the way that Blender exports .STL files? Am I doing something crazy?