Project Venturi

Project Venturi (Largely with the Anycubic Kossel Linear Plus in mind)

Ok, ok... that's a bit grand for some bits of printed plastic for attaching to you printer but bear with me.

First, apologies:
Exhaust_Duct.stl is in my opinion... awesome. Sadly testing suggests Cannon.stl and Dual_Cannon.stl were not so hot after all. Also Dual_Cannon.stl was quite the SOB to screw in place. I've therefore reworked them both and replaced the old versions with new and hopefully better designs. I'll update when I've thoroughly tested.

Possibly you noticed your printer could do with some better part cooling and saw a good few alternate air ducts to be found on Thingyvese? (an understatement of Biblical proportions)
Possibly you may have heard of the Bernoulli's Principle, and how it may be applied to make a Venturi?

Best look it up, but here comes the 'executive summary':
The faster air flows the lower it's pressure becomes. This is a large part of what allows flying things larger tha