lack adjustable bottom feet

On the top use the original lack feet screw.
On the bottom you will need 4 nuts and a screw for each foot.
To get the nuts in you need a little bit of force (use a hammer :) ).
Print it standing with the nut hole up.

Printer brand: Creality

Printer: CR-10

Rafts: No

Supports: No

Resolution: 0.25

Infill: 30

Filament brand: Extrudr

Filament color: black

Filament material: PLA