No I didnt Stuart.
Been in the office all day and only been back home for 30 mons or so
To allow for lagging you want
26in
-----------------------------------------
I
I
I
I 20 in
!
I
9 in deep
It wouldn't hrt to go a bit bigger if you can. More space = more lagging.
You need to be able to open the front to maintain/flush etc
You can drill the holes in the side for pipes when you fit the RO mate
Cheers
Andrew