All other creator's part cooling ducts for the creality Efit extruder did not work with the Spider hotend I installed (the nozzle wasn't aligned.) I remixed a design from @DCHFPV for the Sprite extruder to fit the stock fan from the E fit.

I have successfully printed at speeds over 250mm/s & acceleration above 2000mm/s^2 on my ender 3 using this part cooling duct. (minimal upgrades, running klipper)

If this works with other models of extruder, hot end & part cooling fan, please leave a comment letting me know.
original model: https://www.printables.com/model/273619-creality-ender-3-s1-spritepro-extruder-part-coolin

Creality E Fit Spider hotend fan duct

Creality_EFit_Fan_Duct_REMIX.stl

This model is a wall-mount for micro form-factor Dell Optiplex PCs which have M4 threaded holes 100mm apart for mounting to the PC's chassis. Mount consists of two mounting plates that slot together with dovetails. 

Successfully test printed (flat orientation) with both Anker M5 and Ender 3V2 in PLA with no supports. Gyroid infill will result in greatest strength between layers, recommend 10% infill or more. You could print upright standing on its side for even greater strength in layers, but that is probably overkill.

Dell Optiplex Micro Form Factor Wall Mount

Dell Optiplex Micro Form Factor Wall Mount - Chassis Plate.step

This is a base / stand / foot that allows a rack-mountable APC 1500 UPS to stand stably on its side if you will be leaving the UPS on the floor

APC 1500 UPS Feet - Stand.3mf

This is a simple holder for the display/controller for the Injen X Pedal throttle controller. 

NOTE: This hasn't been printed/test fit with a display yet, but accurate measurements were taken.

Injen X-Pedal Throttle Controller display holder

This is a stabilizer designed to fit onto the screw clamp of the Logitech Driving Force Shifter compatible with the G29 & G920 racing wheels. (It may fit other models like G27,  not sure)

Printed in PLA at 0.2mm layer height with 40% gyroid infill and it seems plenty strong 

No build plate adhesion

No supports 

Flip over model & print flat side on build plate, model will likely load into your slicer upside down.

Logitech Shifter Stabilizer

This is a stabilizer designed to fit onto the screw clamp of the Logitech Driving Force Shifter compatible with the G29 & G920 series wheels. (It may fit other models like G27, I'm not sure

Logitech_Shifter_Stabilizer.3mf

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Creality E Fit Spider hotend fan duct

Dell Optiplex Micro Form Factor Wall Mount

APC 1500 UPS Feet - Stand.3mf

Injen X-Pedal Throttle Controller display holder

Logitech Shifter Stabilizer