About this 3D model

I was inspired by http://www.thingiverse.com/thing:10296 (thanks Peter for sharing), but: I didn't find any long enough screw and the H1 thread is damaged.Soo.. RubberBanD it's the solution. I designed with sketchup the 2d sketch and I extruded the surface. The object it's not good to watch but it's functioning.