I was able to download the zxy.json file posted above and compared to existing , there are a few little differences but nothing major , added layout 16 and 17 and works ok also added the blank URL placeholders to existing zxy.json tested both almost identical apart from the profiles ,
one thing about this thats not fully working is when you decide to use multi DNS in layout 16 , the first one you use will work as normal but if you then switch DNS the background images do not populate , you need to clear the cache for them to be seen