Conclusively, I hate to say, but would have to say that:
If you are using or going to have Force Sensor Mod for Warthog or Cougar, I DON'T recommend to buy this tailpiece unless the design will be changed.
Of course, the issue can be fixed like I did, but it's not permanent solution.
And actually, it still slightly moves when I apply the force to the stick, even after the my temporary fix.
I hope you'll look at the points carefully, Debolestis.