Thanks again PeterP, but no, I set the screen there to give me some visibility of centre console/dashboard on the bottom screen. I think that particular depth was to coincide with the top of the MFDs.
I did copy the RWR from the profile you linked but had no luck. I'll give it another go though, maybe I'll get lucky, or maybe I did something silly previously. Maybe I need to take it out of the monitorsetup.lua first. I'll do some experiments. This is my last chance to work on it until Sunday, so I may not reply to any further advice of yours for a while. I'm not being rude, just spending 4 days at the pub ;)