I think this might be the same Architects.
His RWPs are plumbing fixtures, but so are his toilets, although some of them are line work, in plan and elevation so a lovely line appears down the centre of all toilets in plan view, SO if you want to turn off the RWPs you lose the toilets, meaning I need to turn off the RWPs individually in the plan.
Wanna get rid of that mahoosive reference plane in the centre of the plan, don't worry there are another 20 or so others in exactly the same place.
The walls don't have to meet do they? its ok to have a 200mm plus gap at the corners, its natural vent.
Oh, and the ground floor level i'm using isn't, the building slopes but still only has one level, so something offset to be above the ceiling in the bottom of the plan, is only about 250mm above the floor in the top part.
So i needed to make my own levels up.
I'm so glad we are only doing above ceiling co-ordination on this one, I'd end up doing time for murder if I needed to work on this full time.