Thanks to the totally viable hotend cooling demonstrated by @Bjorn_Marl , I have decided to give it a try, too. Sucky part is I will have to overhaul my x-carriage, so I sat in Fusion 360 all day and this is what I came up with. The bottom two parts for cooling the hotend(E3D v6/Lite) and part are designed to be print by Shapeways in steel. I will print the carriage and chain in PLA. Only a teaser for now, but hope to order soon. 
What advantages does compressed air cooling have?
@Thomas_Balu_Walter Instant airflow (no delay for fan to spin up), lower profile, and higher print temperatures.
But you can’t regulate the amount of part cooling airflow like you can do with a fan. So it’s either on or off?
@Thomas_Balu_Walter Initially, yes. But I hope to tie the pressure regulator into the arduino fan control, so it will function the same as a standard setup.