Proton Pack Gearbox

UPDATE 19/7/2019: Specified position of WallBooster.

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, 3Dprintable gearbox for Ghostbuster Proton Pack based
on Steffan Otto's plans at:
http://www.gbfans.com/wiki/Stefan_Otto%27s_Prop_Plans

There are other versions of this, but they are very wasteful of plastic as the entire body needs to be filled.

Also, the rounded 'gear housing' at the top is printed
orthogonally to
the radius axis to give a smoother finish.

Print the attached gearbox.pdf at 'Acutal Size' to get a plan of the
drill centres to mount it on the motherboard. Use six #4 screws to
fasten it.
Attach the top part to the bottom using four #4 x 5/8" self tappers, or use epoxy glue.

Print GearboxGearHousing with 100% infill for strength when
attaching ribbed tube.

Use the wall booster on t