Mature Metal discussion

I recently picked up one of the great JailBird units, and overall I’m quite happy with it. No issues with erections (they don’t occur! ) and the security as well as sturdiness are spot on. However, I occasionally experience a “burning” feeling on the scrotum skin right at the base of the ring. This was a big issue for me with my CB6000S, which is why I switched to the JailBird since everyone else seems content with theirs. With some gentle nudging, I can fix the problem by pulling the skin through the ring to create slack around my balls, reducing the tension and making everything fine, but it tends to build up again after about an hour. I’ve also used E45, a lanolin-based soothing cream that cures the issue for often a day or so. The device works either as a punishment/tease/denial setup for a week or two in 24/7 mode, or whenever I’m away from my wife during work hours etc., so comfort is key. I had some very uncomfortable minutes on day four of a 24/7 lock-in when my left testicle pulled through the gap - something I definitely want to avoid repeating! I might have used too much cream, which likely acted as lubricant and allowed that painful movement. The burning appears caused by a gap that’s slightly too small, but obviously widening it isn’t an option; if anything, it needs tightening. So any thoughts?