Say good bye to those days of torturing your fingers while levelling the bed on the CR-10, here I remixed a previous version and I made a bigger knob attachment for manual levelling that it's easy to grab and still fits perfectly under the printer bed without obtrusion. I hope you find it useful as a did.
INSTALLATION NOTES: Unscrew the bed knob off the bed COMPLETELY, you'll notice the printed knob has a round collar.  The bed knob has a round lip.  Fit the collar of the printed knob into the lip on the bed knob then screw back on with that side facing up. This will prevent the wheel from falling off in middle print.