Quote Originally Posted by number40Fan View Post
I personally like to tighten the bed plate springs instead of using a shim. Helps with holding the bed in place on those fast infills.
I have not found any benefit to having the bed be loosey-goosey because the leveling screws / springs are not tightened down. I completely agree that having the bed NOT wobble about makes for a superior print with less reflection artifacts.

Shims are intended to be used to compensate for the major shifts in the build platform Z-Axis home position that occur when different arrangements of build surface material stack-ups are placed upon or removed from the print bed.

In the ideal scenario, the springs are well compressed, the platform is level, and no shim is needed when using the thinnest of your build surface stack up options. When you choose to put in a different and thicker build surface, a shim of the perfect thickness is put in and (ideally) no adjustment of the leveling screws is then necessary.