Chastity and orgasm denial discussion

Hello I’ve been practicing chastity for several years now, and we’re still really enjoying this way of life. My only device has been the CB6000s, worn constantly day and night. The tube component gets swapped out twice because it usually cracks up, pinching the skin after intense play sessions. We need some guidance on what to buy next. Our top choices are the Holy Trainer V2 or the BON4. Ideally, we want something with dimensions close to the CB6000s, perhaps slightly more compact. There are steel options available online from China, but they look a bit harsh and seem like they might hurt, which is why we’re leaning toward silicone. Any tips would be great. Best wishes Rob