Also happy to report the overheating issue when towing up a long incline seems to be resolved. A combination of the new maf sensor correcting the fuel usage and removing all the underbody plating that came with the one hung low bullbar to improve airflow.
I've put a brown Davis radiator guard in place of the bull bar plating.
Just did the same trip as last year, towing the same load where the car previously overheated on a number of hills and the needle didn't move.
Progress!

