I recently bought an Ender 3V2 printer and had trouble leveling the bed. After searching the web, i found a suggestion to clip off the tab on the Z-axis switch assembly so it could be lowered a bit more than designed. This did mean I could adjust the left back properly but then when the front and right back were adjusted level, the springs were not very compressed so not too stable. The left back bed support incudes a bracket for the heating cable and this was limits how low that corner can be adjusted. I realized what was required was to make the other three corners naturally higher5 with spring compressed. So I added 4mm washers between the spring and bed on those three corners. This solved the problem and I was able to put the Z-axis switch back to where it was designed to be. The only issue then was that the springs were not being compressed exactly perpendicular to the bed. I decided to make special washers with a cup for the spring, one for each end of each spring. This really did the trick!
I would be happy to share the .stl (or even the .blend) file for this washer but don’t know where, any suggestions?