Proton Pack VacTube-Parametric

UPDATE 2/12/17. This part was used in the Ghostbusters Station 6 fan film. Check it out on youtube at https://www.youtube.com/watch?v=RHMUsQqLmRg

A full size, 3D printable version of the Vac Tube from the
Ghostbusters proton pack based on Steffan Otto's plans at:
http://www.gbfans.com/wiki/Stefan_Otto%27s_Prop_Plans

The stl file attached is for a ribbed tube of 27mm diameter. But the
OpenScad file attached can be used to change the internal tube
diameter to match yours.