I have made the setscrew tight enough that it will not back out during firing.
Blue locktite would be fine if it makes you feel better, but let it dry on the setscrew before instaling it in the Bullet Button Convertible. TM.
This unit has been a long time in development, and it is GREAT! Only 4-5 turns between settings. Allen Wrench included of course.
Our top notch customer service included free of charge.
I thought about caling it the Bullet Button "Trombo". LOL
3 settings no waiting.