i know there are ballgag loras out there for Krea2, but i wanted bigger Ballgags, the huge gags, not just small, i wanted the jaw breakers :) So i tried this little lora and it works! a small bug is that it seams to not work with a character lora, at least in my testings, but with other clothing loras, like my posture collar lora and some latex loras as you can see in the reference images

you can higher the strength of the model to make the ball somewhat bigger but beware that with 1.5 and above the model tends to do only red balls, no more other colors, haven´t trained it with much different colors, only black and red, so no garuantee that other colors work at all