At what point does something become custom content?

I recently made a single-dial full-body morph for G8F that originally included a number of morphs by other people, at least one of which was modified with the geometry editor in Daz and originally from an earlier version of Genesis. However, I did do some sculpting of my own for the new full-body morph, namely around the feet and lower legs. Would it be okay for me to upload this new morph to the blog as custom content?