There's some minor issues with the blog post though that don't make it entirely correct Genetic Programming as written by Koza's. I'd have to dive into it again

There's some minor issues with the blog post though that don't make it entirely correct Genetic Programming as written by Koza's. I'd have to dive into it again but I think it was either with the way mutations are done or how fitness is evaluated. Anyway, it should be close enough.