Configurable spacer plate for NEMA stepper motors

You can use this configurable thing to make a spacer plate for NEMA (17) stepper motors.
The following parameters can be set:

HEIGHT: Thickness of the plate.
BASE_SIZE: XY-dimension of the plate.
BASE_CHAMFER: Chamfer of the outer shape.
HOLE_DISTANCE: Distance of the mounting holes.
HOLE_DIAMETER: Diameter of the mounting hole.
FIT_DIAMETER: Diameter of the motor fit.

If the height is lower than 5.0mm, no fit for the original mount is made.
The default values should fit for a NEMA