Chastity and orgasm denial discussion

Greetings everyone! As the title suggests (in acronyms), I recently acquired a CB6000. Aside from a minor split near the tip shakes fist, my main struggle is that I can slip out of nearly any ring and spacer combination that fits me reasonably well. The smallest ring size 4 works, but it causes significant discomfort when erect, turning my testicles purple, so I suspect it might not be the ideal fit. Plus, I can pull out while flaccid even with this one. I’m hesitant to attempt ring 5. Ring 3 seems acceptable for now, though slipping is possible. Regarding spacers, longer ones feel more comfortable when erect, but they don’t seem to drastically affect my ability to pull out while soft. So here’s the question: What solutions have you found to stop pulling out? Did it work? Have you modified your CB3000 Points of Intrigue (POI)? Or did you get a KSD-3G? If you haven’t had issues at all, I’d love to hear about that too, since I can hardly imagine anyone using an unmodified unit without some pullout trouble. Also, would getting a piercing help, and in what way? It’s not entirely clear to me, and it isn’t my favorite idea (I’m the type who might get snagged on things), but I’d consider it if effective. Thanks, -Xela