CB Range discussion

Hello, new member here. I just bought a brand new CB-6000s, thinking it would fit, but it didn’t. It’s too small.:( … very sad since I was looking to buy one for years, it is my first belt. Kind of killed the fantasy. Anyway … Obviously because its too small, just putting it on make the cage full and push the meat backward. So as soon as I get slightly excited, the erection starts behind the ring .. kind of “inside me” … and pushes the whole belt and ring forward and at that point, just a slight touch of the finger, or simply walking, makes my dick slide out. There is zero security at all. I didn’t expect that belt to be so small. I’m like 3.5” flacid and probably around 6” hard. I wanted a beginner belt, I like the product, but I should have bought the regular one.:( So I’m willing to give it another try with the CB-6000 cage, but I’m not sure what is the best route to take from here and I wanted some opinions. The CB-6000 doesn’t look much longer, will it make a noticeable difference you think and prevent to get an erection “behind the ring”? In my head, right now i have the following options:

• Take the risk and buy a new CB-6000
• Try to trade the 6ks cage for a 6k cage on here
• Buy a 6k cage and try to get rid of the 6ks on here
• “No cb-6000 wont fix you problem!!! Its not your solution!”
• Give up on chastity fantasy (mmm no;) ) Its gonna cost me money I fear … but If i can at least make it work and lock myself in efficiently, i’d quickly forget my mistake I’m sure.;) Give me your thoughts, opinion, advice. It would be really appreciated. Thanks