D-bot Bed Leveling bracket knob (Adjust from under the bed)

i designed this bcos top of my aluminium is covered by PEI sheet and i dont want to drill a hole on my PEI sheet. This design allow us to adjust the be height from underneath by turning the knob. No tools or hex screw driver needed.
to make this work u need:
8x M3 washer
4x M3 screw (preferably 40-50mm)