The drawing shows like a gooseneck, with the shower head raising up . The photo shows a shower head dropping to a lower height. Was a different shower head selected at pre start... minor details like that could catch anyone out.
However if it was built /placed incorrectly, would believe the independent building inspector will identify and flag it to be corrected.
We did speak to Dale Alcock at the initial stages but found their pricing to exceed our budget quite significantly. Keen to know about their build quality as well.