Here is my take on the Lego separation tool. It's a remix. I wanted to create an angle to make it easier to remove parts that were adjacent to other parts.

It was also important to me to design a part that doesn't need support.

This prints well on my printer and doesn't need any clean up before use. Although it fit well for me, you may need to scrape the inside of the removal head as the overhang may not print perfectly on everyone's printer.