Chastity and orgasm denial discussion

I’ve never tried chastity before, but I recently decided to give it a go on my own. I’ve been watching from the sidelines for some time and realized that I am one of those who grow… The cage I purchased is:

Since then, I’ve adjusted the pins at the penile end so they are shorter; it’s still a matter of trial and error. The issue is that my testes tend to push their way under the primary ring.. let me tell you, that hurts! My balls don’t hang down like other men’s do. After a hot shower, they drop out and dangle around… but otherwise, they stay tucked in close. I’m having trouble with the smallest ring slipping off; it’s probably 1.5”? How short can I make the pins? I am reducing the space between the main ring and the cage… at what point does that gap become hazardous to my health?