woke up and realised this was pretty rough way of doing it.
This method should be titled “multiband compression with accumulative distortion” 
3 separate identical sources with 3 separate NFX-COs would be a far cleaner method (or changing NBAL to far neighbour input on track 15 so it’s using same source as 14) so they don’t use the page 1 settings from each previous NFX-CO. 
you could have 8 INP-CAs and 8 INP-CBs for 16 tracks of LR stereo processing.
X.05 has evolved the MD into a mastering workstation!