Mill power feed motor drive adapter

First kinda useful thing I've designed that others might need...it's an adapter that slides over the plastic splines on the shaft of an automotive window motor (out of a 2002 GMC Envoy, specifically....) I am mocking up the parts for a home built power feed for my RF-31 clone mill. I have also done an adapter to mesh with the x-axis shaft on the mill, and will upload as well.