Proton Pack Attenuator

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

This is the sloping part of the Ghostbuster's proton pack booster from
Steffan Ottos' plans at:
http://www.gbfans.com/wiki/Stefan_Otto%27s_Prop_Plans
Use in conjunction with:
http://www.thingiverse.com/thing:518252
The axis for the tube is printed orthogonally to the print plain. This is
because the two cylinders on the top of th