Customizable Stackable Magic Wand - fixed

Wish you had a Customizable, snakey, spiral-ly magic wand? Here's your chance!

Aside from that, this is an experiment in using OpenSCAD's linear_extrude function, twisting and extruding a circle to form a cool magic rod. I then use the same technique to make screws and screw holes, allowing me to assemble a long magic wand from even a small build area. This technique of making screws and nuts is pretty simple to code and works well. Note that the screws and holes are pointed, so that the hole