Remixed the Ender 3 Max dual z height sync spacer ( https://www.thingiverse.com/thing:5173251) from scratch to fit the Ender 3V2. So basically I took the idea and made a new version to fit my needs.
Used to sync the heights of your Dual Z axis.
And can also be used to help set the Z axis rollers.
Clears the endstop nicely. You need to print two. Infill can be low. No support needed.