CR-10 Leveling knob plug

Have you found that the leveling knob can be loosing along the printing when the bed is moving back and forth? Using the big knob you downloaded from thingiverse and this knob plug can easily solve the problem.
Of course, you need one plug for each knob. Totally four plugs.
One more thing, this plug will reduce your bed leveling frequency dramatically because one major reason why you have to level your bed is because the knob loose away during previous printing.
https://www.thingiverse.com/