It didn't work. Too much back pressure, no air came out of the nozzle at all! Just to test the 'fan' theory, half way through the print, I pointed a case fan at the print and it instantly improved in quality.
So, the fan is needed, my first attempt failed miserably.
The fan mount I chose looked quite promising. It mounts around the existing X carriage and directs air towards the print area.
I found myself in a room, with an orange marker, and my cone shaped nozzle. Of course it’s going to become a road cone.
Doesn’t look very good does it? Half way through the print, I turned a larger fan on it, and the square pillars became square shaped and not the shagbark hickory shaped they where before.
A little subtractive modification to my additive manufactured part, and I think I may have something serviceable. Air actually moves through it now.
It is installed. Time to test it would be tomorrow, as I am nearly out of filament and need to ration it or I will end up going days without printing.