About this 3D model

This case combines the Apple iPhone 4 with the Acer C20 Pico Projector. To be printed with 100% fill, 3 shells, 0,1mm Arnitel filament layer height, with raft and supports. STL file needs to be fixed. The normals are not manifold. Unfortunately Blender, cloud.netfabb.com and Netfabb Studio Basic could not do the job. It is no big deal for Makerware 2.1, but Makerware 2.2 messes up the slicing file. Any tips?