This is a remix of Hangtights great V6+BMG Direct drive system for the Ender 3, to fit the duct to the Geeetech A10 using an E3D V6 and BMG Extruder.
This allows you to convert from Bowden to direct drive, using an optimised duct for a 5015 blower. I recommend using a slimmer 'pancake' stepper to reduce weight, but its not immediately required and the stock is fine.
For the duct and ABL mounts, please visit Hangtight's original design, here:
To access the CAD for this thing, please visit my Blog where I upload all my CAD files, here:
Print with supports under the relief cuts on the underside, and within the slot at the top of the motor mount, nowhere else.