GSNA ,
Here is an update to the niche object. While still not perfected it does resolve a number of the larger issues with the original, including the "header" that appeared with the wall thickness not matched. I also added the ability to allow the niche to exist within the wall completely, provided that the niche wall thickness and depth is not set to be thicker than the wall thickness.
Erich
AC 19 6006 & AC 20
Mac OS 10.11.5
15" Retina MacBook Pro 2.6
27" iMac Retina 5K