V2 - Stackable Impossible Passthrough

The Design You Asked for it, its here! The new Stackable impossible passthrough! Fully compatible with the V2 Series, The “male” part of the thread seems to defy physics by passing through the slightly larger “female” Part Now your can print as many tall parts as you like and add them together to make an extra long vortex tube! The Ball Twists its way down the Tube There is a Top cap and a Bottom cap to prevent the the ball escaping Or, if you've got a spring from a ball point pen lying arou