I wonder why almost everyone is so delighted about 3D printing (I mean generally)... from technological point of view it's a crap, 3d printed models only have good shape, strength is poor, precision too. I saw couple of models, printed on proffesional Stratasys machine, it took many hours to print them, and quality also was not good too.
In these applications, where some forces affect on construction, using 3d printed parts is a mistake. It's good to make covers, prototypes etc, but not stuff like this.