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.
I've found if you have Simplify 3d, make a process with low infill (15%) up to about 16mm and another from 16mm to the top (70mm?) at a higher infill ie 75%, this will strengthen the arm while leaving the base part nice and flexible. don't know if this is possible with other slicers?