About this 3D model

My first "Hello World" in 3D Printers (REPRAP Prusa Mendel). Designed with OpenScad and a little primitives and a lot of problemas with the height of the model. I had to cut the model to many times for to print in the Prusa M. Four Dynamicel AX-12 (3 grades of gires) , and a lot of problem with the robomotion program from Bioloid Firmware. Now, I need to design new complements and new details for the head. http://www.youtube.com/watch?v=KfUhfVoKQLE&feature=youtu.be