An adapter to replace the 4010 extruder cooling fan with a 4020 blower fan.
Has good clearance with the gantry, no change in build area.
Mounts to the stock extruder with stock screws, 4020 fan mounts to the bracket with 3× M3×18 bolts. (M3×20 bolts can be used for the two front side holes since the screw holes line up with the recess in the stepper motor.)
See also:
The author marked this model as their own original creation.