I dusted off a very old plan of mine, which I did many years and stones ago. I wasn't able to build back then in stone what I designed on the computer. Many years and a few thousand stones later the model still faced my collection with severe challenges in terms of thin stones. I used three main boxes: NF19, AF20, and AF22, but I had to dig for 1/4 thick stones in many of my other boxes. Advanced KK builders will notice the special stones used.