Ender3 Z Endstop Elevation Block

A Z-axis end stop lifting block.
I often swap between the glass build plate for flexible filaments, and the OEM build surface for rigid filaments. The easiest solution is to stack the poly build plate over the glass, then adjust a Z offset in the slicer software (Z Offset Setting by fieldOfView in Cura Marketplace). After adding a glass plate to one of my Ender 3's I discovered there wasn't enough space to loosen the bed-leveling screws on the right side of the heat bed. Re-squaring and tramming the X-axis bar reduced the problem but still didn't sufficiently grant leeway to adjust the bed levelers.
These lifting blocks provide a standardized lift distance to raise the Z-axis End Stop by 2mm, 3mm, or 4mm. The measurements are approximate, not exact.