I'll second that - great job with this project and sharing your notes with the forum.
You did a lot of homework that will greatly help someone down the road.
So now that you have a factory hitch, you need to save your shins some skin, cause that bare metal sticking out is going to bite you a few times.
Consider adding a hitch cover like I did. I was more prone to bang into the hitch in the beginning, but have adapted to it for the most part, but protection helps.
Link below is the one I got because it was available at a local auto parts store chain. I like it and it helps to create a buffer.
https://www.pepboys.com/product/details/9133444/00739?quantity=1