I had to cut a 9" square to get access to plumbing..
Double 1/2 wall.
Dare I put the 1st layer of rock on, bevel the corners on the 2nd layer just mud the seam (no paper & or no Fibafuse). I'm avoiding the massive feather I need to do if I create a "thickness" due to paper. It's close to a baseboard that is snug....so feathering on one end will look sorta ~eh~ as I will just feather out around the edge of the baseboard.