Better Blower Mk2

Better Blower Mk2

*Under Construction... getting closer to being ready - just doing some testing...*

One of my first projects, after getting a 3D printer, was to design & make an upgraded blower fan as the one that came with my printer was a bit puny. (See my Better Blower thing).

I'm still running that upgrade and it's doing a sterling job - indeed I'd go so far as to say the Anycubic Kossel Linear Plus is a great printer for the money and it's blower is really the only glaringly weak point. Still, I wondered if I could do better:
-More Power!
-Using more readily available parts
-Easy to print and build
-Suitable for most printers that rock a 40mm blower as standard.

...Hence the Mk2.

There are three versions of this blower; a simple version where space really is at a premium, a version using Venturi principles for added efficiency, and an actively blown Venturi version to get every last cfm. The three differ only with regard to their face plates and fans so:
-The