Penile Pierces and the CB6K S Model

I’ve got a CB6K on, but I trimmed the tube length to suit me better. It’s basically functioning as a CB6KS now. Slipping out is possible if I make an effort; it actually happened about a year ago. When it did, I felt like I’d been unfaithful to my wife with someone else. So even though ‘I know’ slipping out isn’t impossible—I just decide not to do it. Right now, the device serves mainly as a symbol of her authority over me because we both realize that if I lose control, there’s still a chance for self-pleasure. My wife has recently decided to step up her game, so to speak. She suggested I look into getting a piercing since she wants to make absolutely certain “I can’t escape and jerk off while you’re at school or the grocery store.” The goal here is to keep my penis shaft locked inside the bottom of the tube so it doesn’t pull out. Could anyone recommend the best type of piercing for this purpose? How do you attach that jewelry to the plastic tube’s end? Which kind works best? Also, if we eventually decide to stop doing chastity, will a penile piercing close up on its own once I remove the jewelry? We aren’t keen on steel devices right now. I already have my hands full wearing this lightweight plastic unit and can’t picture dealing with the constant downward pull of a heavier metal one. So, finding a way to integrate a piercing into the CB6K is key. Thanks