Chastity and orgasm denial discussion

Hi everyone. I received my first genuine chastity device a couple of days ago, specifically a Jailbird from Mature Metal. It seems nearly flawless right now and is definitely suitable for round-the-clock daily wear. However, as a newcomer to the world of chastity, I have some queries. Since the tweaks needed are straightforward, I thought it best to check if there’s any room for minor improvements. To start with, my base ring feels somewhat loose. It’s easy enough to slide in and out even when using a substantial anti-pullout pin; you just lift the top of the ring slightly while pulling on your shaft (this does leave you partially inserted, but getting it fully back or out is no trouble). Throughout the day, the device shifts quite a bit. Frequently, it slides forward about half an inch, causing a portion of my scrotum and shaft to peek out. Would switching to a tighter base ring fix this? What’s the ideal tightness? Should it remain secure right at the bottom of the pelvis? I know nothing is perfectly unbreakable, but would a smaller ring make escape harder? My other question concerns the space between the cage and the base ring. It seems to me that this gap might be slightly too narrow because my testicles often end up pressed flat against the underside of the cage. I had always pictured them hanging more naturally. Is this normal for these devices, or should there be more room? Could it also be related to the base ring sliding forward?