CB3000 assistance needed

Hi everyone, I bought a CB3000 recently but hit an issue. It’s actually pretty simple for me to slide my penis out through the ring, which kind of defeats the purpose.:P I’ve tested with the tiniest ring size available and confirmed it isn’t about width (my cock fits just right in the tube). I found a workaround by using two rings; this stops withdrawal but leaves very little space between the device and my scrotum for the sac to sit comfortably (and I believe having your balls squished around the clock is undesirable.) So, does anyone have advice here? Perhaps I’m missing something? Also, on a broader note: how long did it take you all to adapt to wearing your chastity device? My ring area has been giving me an uncomfortable burning feeling and I hope that’s just part of the adjustment period.:) Appreciate any help.