So I have two bathroom doors that take the little metal key in case someone locks the bathroom door and steps out.

This is great in a pinch.  It helped me dial my settings in as well as the result I finally got was solid and the layers didn't separate.  I had to adjust my settings a bit after the first run, but now I know that if I increase my flow rate by just a little I get a much more solid result.

I printed two, one upstairs and one downstairs and they work with a little bit of turning.  Feel free to download and adjust.  I tried to make the tip as resistant to turning forces as possible while not making the tip too thin.