By request, I'm uploading my FaceTrackNoIR settings I use in DCS World. It has helped many smooth out their FTNOIR tracking.
Simple unzip this file, place the DCS.ini in your FACETRACKNOIR\Settings folder and be sure to backup your old .ini file for DCS. Also, be sure to get the corrected Default.lua for head tracking that has been broken since June 2016...the link to that download is here: https://www.digitalcombatsimulator.com/en/files/3308234/
Message me on Tactical DCS Discord if you need help: https://discord.gg/Jc4K9r4 The DCS FaceTrackNOIR playlist on how I set mine up is here: https://www.youtube.com/playlist?list=PLroS5xjXW90vzQqEyONxyScykYpObJXtb
Enjoy!