I made this little standoff to compliment Riffer's Motor Plate with Nuts. https://www.thingiverse.com/thing:2249019
This bolts on to the motor and then to the captured nuts in the motor plate. Easy to remove and replace, clean or check bearings now, and it can be used to offset your CG if necessary (add spacers and longer bolts)
The 'small' posted will clear Socket Heat screws, and the 'Thin version' will just barely clear Button heads. Added a 'Long' version too to move CG back if needed.