Fixed, thanks. I wasn't sure if the post was ready for Reddit, as it's mainly some thoughts written down for advanced D users.
Thanks for writing this. Aside from the primary purpose of the article, I was able to learn along the way more about D's mixins because of it.
As a game architect, I love discovering ways to further abstract, reuse, improve speed, and aid readability... all stuff that mixins can help with. ;)
