Smart Effector 40mm Noctua fan duct

I wanted to fit a Noctua 40mm fan to my Smart Effectors (one with an e3V6 and one with a Volcano) so came up with this.

One of my design objectives was to mechanically isolate the fan duct from the heatsink and the Z-probe capability so this mount fits onto the ball studs and only touches the PCB at these points.

There are four versions:
- one for no accessories (both ball stud mounts are the same height)
- one that allows various accessories to be added (through having one 'foot' thinne