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
I designed the plastic part to be printed in as solid a setting as you can, then glue in a small cut section of plastic tubing, OD 4.5 x ID 2.5, cut at 45 degree angles on both ends to redirect the air stream, tap the top hole to M5 for a SMC, KGS04-M5, SUS MALE CONNECTOR, 4mm TUBE X M5 and 2 M3 x 20 socket head cap screws mount.
I use a compressor piped from my garage at about 5PSI just a wisper.
I also placed a small bit of clear plastic tape to the face of the hole to keep the air circulating, this may not be necessary.
Also installed a Z-Temp that works fantastic!
I highly recommend this!