no support needed (no, really... not needed at all). Can be printed in various scale without any major problem on any descent filament printer .
you can see a rendering animation of the model here : https://youtu.be/K9VPdU2mQjc
The printed sample use natural ABS 1.75mm, 0.15mm layer height, 2 perimeters, 10% infill and x0.8 of the original scale. i used repetier-host with slic3r 1.2.9 , and Simplify3D for my test print.
i printed it at various scale without any major problem (i don't test it under x0.5 scale ).