It started of as 'Green version" of pepakura, so that we can save the usage of paper and save more trees, since we will need half of it, and the rest of the half is just simply flip the template.
It is not lazy. In fact, it requires "more" effort because I had to cut the model into two, and remove the other half outside the "active" area. I personally do not like this too, as I do more of "JFcustom" style. So what I did is to flip the template directly to create one whole piece, when I trace on the foam.
You asked before about paper version, I already explained to you that at this point, it is quite impossible to make it in paper. Maybe I did a lousy explanation, but I don't know any other way to explain it.
You have bought my upper torso file, if you had an idea how to do it in paper, let me know here, PM or email. I might be accommodate your idea and make it paper version.