Modified duct to use a 5015 blower fan instead of a 4010.
I made two versions, one with 3mm holes to direct thread M4 and another with 4.9mm holes for M4 heat set inserts.
Print with flat part of duct on bed, no supports needed.
12/30/2022 Version 2 (V2): I printed one out and tried it, made some minor changes.
12/31/22 Version 3 (V3): Printed in black PETG. Fits great, minor tweaks done from V2. Use M3x6 screws to mount it to the motor.
The author remixed this model.