3d concepts

lately i have been working in Cinema 4d to visualize some prototypes for my controller and the potential solutions for it

this image below is a prototype for a potentiometer housing

as i made some prototype designs for the rapid prototyping printer i ran into some bumps as my design had some problems with the way normals where mapped in cinema 4d.
and thus giving strange results in the prototyping software as it couldn’t read it right. hope to have a solution posted on that soon on how to best prepare my models for prototyping using cinema 4d