Since the book is my first effort of that sort, I want to do as much as possible so that people who attempt the project can be successful. I hope that it will be of benefit to me in the long run by way of positive word of mouth. I don't yet try to manufacture guns like the RotaryMek-10X for sale because of the amount of labor involved in making them. In the future, if I am able to outsource enough of the production, I may be able to sell the finished guns.
Most people wouldn't take the time to this, very cool of you to do so and you're really not making anything on this which to me makes it even cooler. Just out of curiosity why don't you sell them off your Etsy account and make a little profit for yourself?