I made some of these a couple of years ago.
With the exception of putting them back "together" so I could insert only one frame at a time in a regular deep box, not having to make a whole box of the half frames. This is a deep frame that is cut in half. I used a strip of 3/4" board in between the two frames and secured with a single nail in each frame into the 3/4" strip. I did use foundation and cross wired them in place. Was just playing around with the idea and have not made up any of the queen mating nucs yet. Just another way.