After a long bout of being broken, I got the 3D printer back online the other day, just in time to design and print off some icicle Christmas ornaments.  They’re built from four rectangles that spiral down to zero dimension, all at different prime number degrees of rotation.  The result is a fluted pattern that nearly repeats itself (but not quite).

 

hanging icicle_printer

 

I’ve posted the design files here.