Zortrax active cooling of extruder gear

I have an Zortrax M200P that has been modified by myself to allow using all the other plastics available on the market today, PLA, ABS Nylon, Wood and metal filled and just as with my "UP Plus Pro" I found the stepper motor of the extruder getting too hot over long print times and transmitting the heat through the feeder gear and pre-softening the filament causing strip-out, so I added this mod to use compressed air to actively cool the gear, it works great just as it does on my other machines