Bed spring rather than plastic spacer
Q: Doesnt the ABL function sort of counter the need to do this by creating a mesh and countering any minor discrepancies in the bed level?
A: Keep in mind your printed part will be skewed based on this. You can mitigate that by starting off with as leveled of a bed as possible.
Fans
Hot end + Dual 5015 Blower fans
https://www.reddit.com/r/Ender3V3SE/comments/18xjatt/upgraded_the_stock_extruder_fan_to_a_40mm/
25mm to 40mm fan shroud
https://www.printables.com/model/651711-ender-3-v3-se-25mm-to-40mm-fan-shroud#preview
- Shroud can be mounted with original screw from the fan
- 40mm fan can be mounted using some screw or use the anti-vibration silicon insert
- PETG should work, PLA probably will melt
CR Touch mount
https://www.thingiverse.com/thing:6417801
Dual fan duct
https://www.thingiverse.com/thing:6297778/files
Capricorn
Printable upgrade
Input shaper mount (accelerometer sensor mount)
https://www.thingiverse.com/thing:6262367