Fx Impact Hammer Spring Screw ... need help

So.. I set up my gun, chrony it, adjust the hammer spring and all is well.



Then a couple of days pass with some intermittent shooting and I see a POI shift, I chrony the thing again and it's 30 fps lower.

Come on.

I retune it and the same thing happens again a few days later. It seems that the hammer spring adjuster just unthreads itself.

I can't be the only one that has this issue, what can be done? Blue loctitie?



Thsnks!