All-in-one E3D v6 Fan & Part Cooling Shroud V2

This is and update from Thing : https://www.thingiverse.com/thing:2714954
Changelog :
- Shrinking the funnel from filament fan output to focus the airflow
- Angled fan output to direct the airflow to below the nozzle, not around it
- Constrained wire bracket to avoid untidy wires

PRINT IN ABS or other material with greater thermal resistance than standard PLA (HTPLA will do)

This is an AIO fan shroud for E3D v6 hotends.

Inspired by UM2 cooling fan and improved the airflow.
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