I've been noticing that the quality of my first layer was getting worse over time due to vibrations causing misalignment. To fix this, I designed simple stoppers that fit onto the bed's leveling wheels. They're not perfect and could be improved, but they hold well and are easy to snap into the right spots.
! Just make sure to print two of the longer stoppers as mirrored versions. !
The author marked this model as their own original creation.