Recently installed an SKR E3 DIP on my Ender 3 but found out the fan hit the heatsink on the stepper driver and wouldn't completely close. I made this spacer so that it can fully shut and also not hit the heatsink. A fan cover should fit on top depending on how long the threaded rod on the bed level adjustment is.
You will need to replace the front two screws with M3x12 and the back one with an M3x16 screw. I also included a STEP file so you can customize it.
If using Cura, print at 100% infill to print faster.